First of all I'm sorry for the review delay, I'm not doing it on purpose to tease you. It's Saturday and I'm at the office, in the middle of a product release cycle. I managed to bring the FM8 with me in my laptop bag but apart from many empty burn-ins, I still haven't used it with anything inside the bowl.
I can nonetheless already answer most of your questions, as well as share my first impressions:
Packaging
Same kind of high end cardboard printed box as the FM5, everything tight. Again got a euro-spec charger with it, larger than the previous one. This one outputs 15V @ 1A, with the positive on the inside of the mini jack. The jack is the same format as the FM5 and Ascent, I don't have the figures at hand but 3.5mm or something, from memory.
There's a 18 pages user manual (tiny pages don't worry!), not too shabby. There's also a spare drawing straw, as well as two tools. The tools have larger handles than those of the FM5, supposedly to make them feel of higher quality, but I'm not sure this was necessary. They take more space and the previous poking/tamping tool was double ended and more useful (I use it daily to tamp my bowls in all my vapes)
Build and external aspect
The glass straws happen to have the exact same shape and diameter as the Ascent upper straw. They are just a tad longer. I expect the same kind of fragility, but it is safely retracted and stored inside the device when not in use. I understand some people are clumsy and/or unlucky with glass though, so this vaporizer might not be for you. On the other hand, like I said and as pictured below, the huge advantage is that it's 100% compatible with the Ascent glass on glass adapters:
The device shell is sturdy. The powder coating appears to be thicker than on the FM5. At first I even thought that the shell was made of hard plastic, so I could't resist to scratch it a little bit, and it revealed a shiny metal underneath, so I assume it's made of aluminium like the FM5. I don't know what material the two "shiny end caps" are made of, but I do know that like everything chrome-like, they love to catch finger prints (people having the SS version of the Indica will know what I mean!)
Build quality is pretty good, tight tolerances, it's all very precise. The device is sealed and does not appear to be user serviceable. Contrary to the FM5 there are no screws and no visible hints of any kind that it could be easily opened. This means that unless we find a non destructive way to open it, batteries will not be replaceable past their EOL.
I used my hobby-grade digital scale and tried to weight my vaporizers. Firewood 2.1 is 179g, FlowerMate 5S is 185g, DaVinci Ascent is 191g...and well ahem, the FM8 is way above 200g as it maxed my poor little scale out! So I'm sorry I don't know how much it weights but it feels lighter than what it looks like. I mean, you would expect it to be heavier when you see it, but it's not that heavy.
The form factor is kinda surprising. It looks like a big flask, not super sexy but not ugly either... but we all have different tastes and expectations. It feels good in the hand though, nice ergonomic grip, all round edges where you put your fingers. It is well balanced and able to stand on its own on both ends: you can lay it on a table between hits and it won't fall. You can lay it upside down on a table when loading it, and even with the lid opened it's stable. You can load it and use it with a single hand.
But I won't lie to you (and pictures speak for themselves) it's a rather large portable vape. It fits in the back pocket of my cargo jeans (and I can definitely notice its presence) but it will be problematic if you wear skinny slim fits! I prefer to see it as a transportable vape and/or a handy desktop-like vape for when I'm in my house.
Air and vapor path
Now we arrive at the very hot and picky subject that we FC members love to discuss: what is it made of and is it safe? First of all, out of the box, there was a lot of that trademark "new chinese electronic device" smell. So far all my vapes were smelly when I bought them, excepted for the Firewood which had strictly no smell. I already told Smiss to improve that aspect and they said they would do their best, but here we have at least two main sources of smell:
1) what I assume to be linked to the polymide probably used to enclose the heating element (it is the exact same smell I had in my FM5 and 5S, it evokes tape and glue)
2) silicone, used in various locations (ring around the bowl + ring around the glass filter of the bottom lid, both needed to create an air-tight mating, as well as a larger chunk inside the "air tunnel" and to hold the upper glass straw, and finally the straw end-cap which is also silicone)
The polymide smell took at least two entire charges worth of empty burn-ins at max temperature to lower to an acceptable level on my two FM5's, while sitting in a well ventilated room and/or while blowing a lot of air through the mouthpiece. I expect it to go away in a similar fashion in the FM8 but beware that by blowing/honking inside the device while the bottom lid is closed, you can overheat the lid easily. I managed to create a really hot spot right in front of the bowl in no time, so you need to do it with the lid opened (it's not designed to be blown by the way, so it is perfectly normal and expected, hot air will never flow in that direction during normal use)
The silicone smells better than what my Ascent did. In the Ascent it was rather a foul smell at first, here it's a more classic rubber smell. I also expect it to go away after a few days.
Now let's have a look again at the air/vapor path picture Smiss sent me and detail it:
When I unboxed the FM8 I was completely perplex: I opened the bottom lid, saw the little glass filter (4) facing the bowl (I thought it was transparent plastic at first though, but they wrote "glass filter" on the above picture) and then I looked everywhere and couldn't find any air intake! The bottom shiny rotating lid is completely sealed! But air has to come from somewhere right? Smiss engineers being surely skilled couldn't have made such a dramatic mistake... and of course they did not!
What they did instead is pretty clever: air is sucked by the holes in (1), in the process it is pre-heated by traveling close to the heating element, it then flows trough the hinge (2) then inside the lid (3), through the glass filter (4) and silicone mating, then through the ceramic bowl (5) and the bowl bottom screen (like the FM5 probably nickel or nickel alloy, but with larger holes this time) Then what happens afterwards is less clear...
There seems to be some obstruction after (5) then it goes through a first glass straw (6) inside the "air tunnel" (silicone I assume, need to confirm) which is mated to the external glass straw (7) and your mouth.
Now I don't know to what amount the air is pre-heated in (1) and if it's enough in practice to create a mix of convection and conduction heating. We will see when I do the practical tests.
(croped due to size limitation)