I'm not going to even worry about tc mode when I get mine. Others have reported success using wattage mode, and I plan to use it like that. I have an alien box mod, it's a two battery with a squeeze trigger. It'll be able to go way way way way over what the iheat cartridge will require, but it should give decent battery life. I've read that the tc mode on this device is sub optimal, but again, I don't care. Maybe I'll have cake on face after I try it, but I use log vapes all the time....I think I'll be okay finding the temp I like and just rock n roll. But yeah, I'm looking forward to this tiny beast.