Well, every private server has bugs (even retail lol) that's not a secret but the deal is if you have a good development team to deal with these bugs and we have one. If you stay a bit active at forums you will notice that we have daily bug fixes from our developers and trust me majority of those fixes are really important. As Garodar said already, most of the game breaking bugs are already fixed. Also, our server doesn't only offer daily fixes but stability in your game play and of course a large community. Trust me, I literally played in all popular p-servers but eventually I stayed here.
Now you're thinking that this guy (me) is a staff member and it's logical that he will support the server he is working for but all I recommend you to do is to give a try in our server and if you like it you will stay if not you're free to go. It's all up to you!
Anyway, hope to see you on-line as soon as possible :)