Received mine yesterday, along with another TVF4. I've been running another TVF4 on am istick 100 and really like it. I didn't buy the TVF4 kit this time, just the single unit. It came with a .26 coil in it. I installed the batteries, and put a half tank of juice in it, primed the coil, and put it up to 50 watts, which is what I run the istick at. I think I took maybe three 'hits' and the tank was empty. Gonna need to increase my juice making, lol. Feels kinda big in the hand, which I knew it would. I remember not long ago when my istick 50 seemed huge. Now it's one of my smallest mods. I like the 200 so far. Hits very nice. I like the TFV4 too, although I block off most of the air channel, and totally block off the channel in the drip tip.