My son is. He likes it.
I ordered it this morning. Gonna give it a go. I played city of heroes for four years. I assume it is similar.
I did the beta and I have a lifetime subscription. I like it for when i dont have a lot of time I can pop in and play any number of different ways and playstyles. New (FREE) add on content coming out on the 27th among other things it will include a new powerset.
http://champions-online.com/bloodmoon
http://champions-online.com/character_profiles/1191815/view
We should get together sometime. She looks kind of freakish now, but that's my uber-tiny maximum screenspace costume. Perfect for indoors.