I am looking into the Tera Byte Virtual server. People who are using it. can you tell me about your experience with it?

I will be running vBulletin on one of my siteswill it work with the Virtual Server (I heard VB and Redhat don't play well).

I need all the info I can get in this Virtual server plan. How much space is left after the isntalled software etc?

How easy is it to upgrade Apache/PHP/MySQL? can you?

Does it have a web based interface? I am not that good at the cammand line.