I ordered a VVPV from notcigs. I don't expect it to ship until next week sometime, so it's still my "next pv purchase".
The VVPV is a metal VV top feeder that gives you control of the juice feed. - I have to say that VV isn't the feature in that device I actually care about. I'm not gung-ho about VV personally... but lots of other people think VV is the only feature to care about in a new PV. they have their reasons, and I have mine.
I had a plastic top feeder about a year ago. I really loved it. It met a tragic and untimely end when a big steer went a little rogue and smashed me around the corral for a while. When that top feeder was gone, I missed it and made a mental note to keep an eye out for a metal top feeder if anyone ever made one. -- There was another metal top feeder a couple of months ago, but it was too expensive and ended up getting recalled in the first few days they were out. -- The VVPV has been in the works for months and went through quite a lot of beta testing, so I felt confident being an early adopter.
So, the VVPV is ordered. Probably by the end of next week, I'll have a nice metal top feeder that delivers two drops of juice to my atty at the push of a button. The batteries should last all day, and it does happen to be VV. I will be using the VV feature as a fixed voltage regulator instead of using it to its variable voltage capability, but I would imagine that the majority of other people will use it exactly as intended.