Tow Dolly with surge brakes - recommendations?

I have friends who use an Acme dolly and they are very happy with it, I on the other hand have had two Master Tow dollies with surge brakes and if going back to using one I would get one with surge brakes again. By the way you can not back up when using any kind of tow dolly, surge brakes or other wise. As a matter of fact you can not back up even if you are towing four down for more that a foot or two.