Here are my mini reviews, just to put things in perspective, the way I judge vaporizers is based on the quality and tastiness of the vapor first, and convenience second. For example, I use the VRIPtech set up for personal use and the Evolutions unit for when friends come over.
The first vaporizer I'd like to talk about is the Herborizer. A lot of people have wondered whether or not this unit is legit. I purchased this at least two years ago and this was before a dimmer switch was offered. The unit was too hot and I sent it back for a new one, the new one was too hot as well. You would get very thick vapor mixed in with a little smoke. I can see this unit producing really quality vapor since the construction is all glass. I plan on getting my heating element upgraded so I can run some more tests on it. I rate it 8.5 because a lot of my friends liked the thick, milky, slightly smoky hits and I can see it being almost perfect with the adjustable heating element. That's just my opinion but based on what I've on different threads, the dimmer switch does wonders for the vapor quality and is usually the vaporizer of choice at "vaporizer bars"
My favorite vaporizer for pure taste is the VRIPtech setup with the Steinel heat gun. One of my friends is an electrical engineer who has tinkered with all my vaporizers mentioned that the thermal couple used to control the temp on the gun is light years better than any of the other units. The Pro Water Tool and Venturi bowl are all glass which has minimal effect on the taste of the vapor. It is a bit more cumbersome than the other vapes but when you add ice to the water tool, the vapor hits that you can get (in my opinion) CANNOT be beat. As I mentioned in the other review, when I am by myself, this is the vaporizer I use. The learning curve for certain people might be a high, but if you can master the heat gun, I think you will agree that this is one of the tastiest, cleanest, milkiest vapor hits you can get. I give it a 9.5 rating, -.5 points for being harder to use
The Evolution was my favorite vaporizer for when friends came over. The seal on the end of the unit where the whip goes in is airtight, so there are hardly any accidents with people accidently pulling the whip out (which happens all the time with the box type vaporizers that also use whips). The vapor/air ratio is also very high, the only downside is that the screens get clogged easily and if you don't change them often, it gets pretty hard to take hits without using a lot of lung power. It always took a little more lung power to use the Evolution, but with a clogged screen, it would be REALLY hard to get thick hits. I got pretty good at changing screens after doing it 15 or so times so it's not that big a deal anymore, but in the first couple screen changes took me 20 minutes...argh. The tubing for the whip is silicone based so the effect on the taste of the vapor is minimal. I rate this a 8.75
I got the Vaporfection unit when I was researching vaporizers for the hell of it. I was impressed with all the glass that was used, and the heating element seemed top notch. I've had some really good rips hit from this thing but I've always have had trouble controlling the temperature properly. I would always have to turn it up one degree for each time I put in a new bowl. Sometimes it would give no vapor at 320, and at 321, it would be smoky. I returned the unit and got a "upgraded" one but it still did the same thing. Customer service has always been good so they said they will look into it again. Rating would be 4, especially since it was so expensive.
I've had some time to play with the Extreme and my opinion is that it is an awesome bag system. I think it is on par with the Volcano, maybe even a little better, I prefer ceramic heating elements even if the Volcano never gets hot enough for it's heating element to cause any harm. I run it through this bubbler/water filter (that I would also connect to the Evolutions unit) that I had 7th floor make for me before I even owned a SSV. I have still not been able to master the whip mode without the use of the fan. I always inhale too fast or slow, but I get great hits when turning on the fan to any speed. If you fill the bags on setting one, you get some really fat, milky hits. Taste definitely suffers in the bag though and can get dry and harsh if not inhaled quickly. All in all, this unit is pretty slick, I don't think it's my favorite in terms of vapor quality, but when I want to try something different or just play with the gadget, the Extreme is really fun to use. I see myself using this during parties and when I'm lazy.
I just got the SSV today, very short learning curve. I got the Willie Nelson special with the ground glass attachment. I turned it up to about 2 o clock on the heater knob and got some pretty darn tasty, milky heats. When I emptied the herb, it was still a yellowish/green color so I knew I wasn't getting any smoke. I really wish I could do a side by side with the Evolutions unit, but that one died on me a few weeks ago which prompted my Extreme and SSV purchase. One downside is that my heater cover is super loose and wiggles alot, they said they would send me a new one. The bag it came with was a nice surprise, but the zipper broke already. The customer service rep said that it happens all the time and I can get newer, improved bag in October at 50% off, kinda weak.
A friend of mine came over today and he preferred the Extreme bag hooked up to the water tool. He said that he got just as milky hits, but with less effort than with hitting the SSV (meaning no resistance from the bag). If you fill your bags at 215 C (newer unit) on fan speed one, you get really high quality, thick vapor. It's worth the wait for me but the taste was poor. My friend didn't care about taste at all, he just loved the massive hits. I really liked the SSV and based on first impression, this thing is as good as the $500 evolutions unit. I think it looks a lot cooler too and the fact that it does have a digital readout doesn't bother me. I always change the heat based on the herb itself to make sure I'm not getting any smoke. Even though some people don't like the rainbow speckles, I think the unit looks pretty bad ass. I give it a 9 because it didn't take a lot of lung power to get clean, tasty hits. I can't wait to run the connectors thru one of my water pipes with an ice chamber.