I didn't like them in the beginning. They seemed like a bit of a nuisance. Always popping up and often in the way (when they were on front page instead of Celtics articles). Rest of the site tends to go quiet while many posters gathered there instead. So, fairly negative.
However, after taking part in them (and I have done a bunch of them now), I think these CB Drafts are a lot of fun. If you are a general NBA fan as well as a Celtics fan, it's a great place. Definitely worth taking part in. I think these drafts have the best general NBA talk on the forum. Lots of debate about how good players are and how they combine with other players, how to build and create teams. Lots of good interesting ideas and debates. So if you like that type of stuff, the CB Drafts are fantastic.