Haven't posted here in a while *waves* but I've had my Anvil for about three weeks now so I thought I'd give my two cents.
tl:dr - I love it, the case is great, the half bowl is ok.
For background, I got this device to 'ride the line' and try and blast the bowl in one hit. I always use it through a water piece, and I use a double torch lighter that I got online. I set the torch on medium and put the flames right on the battery. I get the first click in around 35-45 seconds. I usually get a really big hit like this-it milks up the piece nicely, and I generally get very dark ABV. If the ABV isn't dark enough I will do a reheat cycle but of course the second rip is a good deal lighter. It hits hard like this.
I also got the half bowl and I thought I'd like it but I prefer the regular bowl. I get less full extraction on the half bowl it seems like. I can't understand it but that seems to be my standard pattern.
After using it for a while, I love the metal tube case. If you put an empty bowl on the bottom of the cap, it being off-center actually makes it easier to fill it by scooping directly from the grinder. The inside of the cap also holds an extra bowl and fits closely so a full bowl won't spill. The case makes it really easy to do a hit, change out the old bowl for the backup, and get a second hit quickly. I wouldn't spend the $40 on the metal tube if you plan on getting a stash or something, but if you just want a way to carry the device and a backup bowl the tube case is great. Obviously being metal it provides excellent protection. The Anvil fits perfectly without rattling or moving.
Overall I love the device. It has been the device I have used over 90% of the time since I got it, so it's certainly passing the reach test. If you can afford it and are interested, I'd say go for it if you want a heavy hitter that will milk up a water piece. I wouldn't consider this a replacement for a Dynavap-it has a completely different function, at least for me. I use it as a blast-you-in-the-face heavy hitter. It sounds like people are finding a lot of different ways to use it and that's very cool.