i have the pure freedom trolley system and im a pretty new wfp`er,
when i started up i used hell and all water, sometimes 1x25ltrs per house, but i was doing up and downs as well, now i only do the whole house up and downs on the first clean to get the frames all clean, then 2nd clean i just do ups, and trad the downs,
i love the kit, but thats me and i havent tried anything else, as the guys i know in the business have the same system and i tried theres first to see if i liked it.
there are lots on the market, it depends on how much you have to spend and how much work you want to do in a day
choice is yours, and good luck
haydn