I use a Bogen ballhead and love it. I have a big heavy tripod which I use for my Pentax 67 and my 4x5. I like being able to unlock the head and move the camera freely. It allows me to level and orient the camera very quickly. I have to admit though that I once played with an Arca Swiss head in the store and it was heaven. It cost a lot more but it was clearly better engineered. It was silky smooth (although it had no load on it at the time) but I didn't feel it was worth the extra money (several hundred dollars more) for my needs.