Just got the Phoenix v5 from Kidney Puncher, had ordered it on a pre-sale (performance unknown). Craig the owner of KP put a statement up "device suffers from a significant design flaw: the air holes are about 3 to 4mm higher than the where your wicks/coils will end up..." so I knew before I got it that problems existed.
Since it has an adjustable air flow ring that can be sealed I drilled two holes on the main body about where the coils would be.. It is hitting harder than my IGO-L's. It needs modification though as at stock it really is not worth it. If you like to modify and tinker I think it is worth the few bucks.
Here is with my (rather crappy) new air holes:
Coils (cotton wick):
And the finished mod on my device:
Overall I would say it is now better than my IGO but since I put the holes kinda low it does not hold much juice and has to be dripped often, not a good RDA for out and about which imo the IGO's are. So some good some bad.
Still pretty new to vaping and ECF so sorry for the small pics.. Still working on that.