All the problems I had with XenForo (very few) were caused by me, despite being Beta. XenForo works like a charm and I recommend it to anyone who wants to start a next-generation community. Using XenForo is really addictive and I have never been so involved in online communities like now. All the feedback from my users is 100% positive.
Life's much better with XenForo
I have to remark that my forum has great content and I have selected a good niche anyway XenForo is great and help me boost my projects and want to start more.
Here it's a screenshot of visitors coming from search engines: