First of all, welcome to CC! Glad to have you here, and I hope you do choose to stay; the fellowship is pretty awesome.
Secondly, it really depends on who you ask...
In my opinion this site isn't terrible, but it isn't great, either. No site like this will be absolutely fantastic. I have no doubt that Satan uses this site and sites like this. Heck, sites like these are probably a prime target of his. You've got to be mature enough in the Lord to discern this kind of stuff. It sounds like you are, considering you're questioning this site, but I can't say for sure; only you can.
If you do choose to stay, I recommend that you should stay out of the Bible Discussion forum. Too much goes on in there...
I'm no expert or anything, but if you'd like, I can recommend some people to you that seem to know what's up when it comes to God.