I've been using XF for about a month now and overall am very happy with it. It's even better with the extended search plugin. Xenforo does need a few things to 'make it whole'. Namely admin tools; Prune user's posts, delete all PMs sent by a user, etc. The only thing member-facing I can ask for right now is some sort of photo gallery and maybe a calendar but I don't have much use for that on my board. Down the road I'd like to see XF become a whole lot more extensible sort of like vBulletin. Blogs, CMS, etc. Only XF will do it right instead of a Hodge podge of crap.