I myself have been using vb for 12 years and purchased my first Xenforo license last week. I have been impressed so far. I really like the way things are laid out and organized in the admin panel, contrary to some of the posts I have read. As with any software, there will be a learning curve. I can tell you how to do almost anything, without looking, in the vbulletin acp. That came with time. (I absolutely hate the vb admincp and find it disorganized.) In a few months I know I will be able to do the same thing with xenforo. I really feel that vbulletin dropped the ball by allowing the issues with php5 and vb4 to take so long to resolve. (Still waiting....) I am running the latest STABLE version of php5 and had to hide errors and still need to remove duplicate posts . vBulletin just isn't what it use to be in my opinion. Xenforo offers a solution for those of us who are simply sick of how incompetent the devs for VB appear to be these days.
I never said Xenforo coders were better or worse than vBulletin. I can say that vBulletin has a KNOWN issue with php5 and vb4 and those "developers" haven't fixed it yet, but have released plenty of updates for their vb5. lol If the shoe fits, you wear it. They need to get off their asses and fix the damn script so I don't have to "hide" errors and can stop deleting all the damn double posts. In my opinion, once vBulletin was sold, it started its downhill journey in my opinion. They are losing LOYAL customers (12 years here - I will NEVER buy another vb license after this php5 nonsense i have been dealing with for over a year now.) because they just don't seem to give a rats ass about their vb4 product. Out with the old and in with the new while saying "fu$% you" to those of us who refuse to use that mess called vb5.