I'm using it. It depends on the gear ratio and the motor that you are using. I use it to play 23T motor, gear ratio is around 5.9 - 6.2, it is hot, but at least it will not be cut/stopped automatically... It's fine without heat sink.
Anyway, I've just added a tiny heat sink for it recently...
嘩! 11 Turns.... 熱就正常..... Although V16 Plus claimed that it can support up to 7 Turns motor, I think you should consider a better ESC if you play such low Turns motor... or use a more conservative gear ratio....