Bang for buck xcube 2 hands down been using mine solidly for the last five days and it's been rock solid never missing a beat and with the latest update now goes upto 180 watts. As for battery drainer I'm getting a full day out of mine on four one year old 25r's at 20 watts on kanthal I get longer using tc. Yes the led is gimicky but it does grow on you lol and the firing bar makes it feel very natural to use, biggest downside for some is the weight it is not a lightweight mod by any means but I've not found it uncomfortable to use at all. I paid £42 for mine from fasttech and so far its been a brilliant purchase and smok are releasing updates on a regular basis and look like they are going to continue support. I only have ni200 at the minute will be getting some ss soon but temp control works very well and is accurate, longevity is the only unknown at the minute but it feels very solid.