I love playing TF as ADC. His early game is absolute garbage, but once mid/late game arrives and you managed to not fall behind, it's really nice to have an hard CC. I wouldn't really recommend it if you can't farm well, aren't very good at positioning and lack communication with your support. He has no harass, no steroid, no escape, no burst (a la graves) and the dmg from is E isn't really noticeable, but he's very fun to play nonetheless. It's possible to win with him, but it's also possible to win with AD Janna lol