Muck truck or similar - Opinions please!

[gardenimprovements.com]

Hello all, this is my first post so go easy on me!!

I am a garden designer and landscaper but i also have a niggling back injury which doesn't help at all. In an attempt to take the strain out of skip loading I am looking to purchase a Muck Truck machine. i believe that there are other makes out there and was wondering as to whether anyone else used one and how might the different makes compare.