Form factor has left a lot to be desired, but the device works, and it works well. I've been vaping with a Mutation X built to 0.45 ohms at 80w since I put the batteries in at 8 this morning. It is now roughly 6pm, and it's showing 2 bars of battery left. I am a chain vaper, and this thing keeps up with my needs. That, by itself, shows me it has value.
I just wish it wasn't so bulky...at least round the edges off more.