Has anyone use vbulletin before. I see many sites that use it. It looks good, but I want someone that has used it firsthand. I am not sure if it is good or not. Before I buy I just want to make sure.:)
vBulletin is a very powerful piece of software, with an extensive admin control panel and with flexible templating. A lot of the formatting is done by CSS (adjustable through the Admin CP). More features are built-in, i.e., don't require installing hacks, than some of the good open-source forum software. (Hacks are great, but can be a pain when upgrading or when trying to debug a problem in an area of code where there are multiple hacks.)
The only drawbacks are that it's big & fairly complex, and that it costs money. Also, it's fairly demanding of hardware resources for busy forums.
The support system is robust - the support forum is very busy, with both users and support team members answering questions. On a couple of occasions I've submitted support tickets, and have received prompt and accurate replies.
Assuming you want a full-featured forum and a couple of hundred bucks is no obstacle, that's the way I'd go. (At least until BestBBS is on the market. ;))