tow dollies suggesitions not criticism

I used a tow master...the only problem I had, the ramps would not fold or slide in...thus a dragging problem when going over a hump..I used a U-Haul dolly once, and the ramps slid in under the wheels of the towed vehicle...I liked that better..If I went back to the tow dolly, I would buy a type that the ramps folded or slid in, it would have surge brakes instead of the electric brake and the system lights would be LED and not incad...other than those reasons, I had good luck with the tow dolly...also there is one other thing I forgot...the wheels had the zerts in the middle for lubing the wheel bearings...I liked that also..