I use MF & 35, use a small benbo ball head on a small tripod which I keep in the car & Emo multiball on a larger tripod. Biggest advantage is compactness, No handles to snatch & grab on what have you. Quality differs greatly from brand to brand. One to look at is Giottos(sp?) smooth & priced in line w/bogens.
Some people don't care for BH's because everything loosens up w/one knob. Just takes some getting used to.