I think that what seems like hyperbolic negativity in terms of some vapers' responses or reactions to the eVic have much to do with the hype surrounding the device. For whatever reason (it *looks* cool,) there was a wave of hype about this device that I've never seen attached to any other PV.
Couple that with a price nearly double of some comparable devices (that don't bother to collect data) and it's almost guaranteed that expectations were (not unreasonable) high for this device.
...most of the "hype" that I run into with regards to is some subset of "It's the best thing ever. Hands down. Join forum X to kiss the creator's ... and get yourself on a list. You could have one within the next three months assuming that the dude's real job doesn't suck all of his energy up. I have four of 'em!"
The upgradeable firmware is a big deal. They've already fixed some of the initial complaints, and I assume they will be resolving more with future updates. The problem is, for the MSRP, they picked the wrong HW (perhaps artificially limiting output for safety reasons), so there is a relatively low amp limitation (2.5A it appears) along with a low watt/volt limitation (11W/5V).
My take on the eVic:
1) MSRP is silly for the quality of the HW you're receiving (threading isn't great)
2) Initial firmware felt very rushed. v1.1 is much better, but still needs a fair amount of work
3) HW wasn't designed (or SW is doing limiting) to handle the voltage/wattage/amperage that would cover everyone's needs - it's fine for the vast majority, but people running really low resistance heads and other such things aren't going to have an ideal range of output temperature (I suspect this was a safety decision, but I really wish they had allowed users to toggle an expert mode on or something to give a better range with the understanding the batteries need to be safe at those power levels)
4) Being able to update the device firmware is a really nice step forward. They added a true VW mode _after_ release. Who knows what they'll add in the future. Flip-side of this coin - just because the FW can be upgraded doesn't mean they should have rushed it out the door with unpolished FW in the first place - it left a bad impression on a lot of people. Big marketing mistake.
That said, I picked one up 7 just a tad over $50 a piece (co-op) for friends/co-workers, and with v1.1, everyone is happy. It works well enough, and can only get better - and @ $50, it's a pretty good deal. $150, I'd pass on it.