I'm currently using Chemical Guys Maxi Suds II (128oz for $20)in my Gilmour Cleaning Sprayer Foamaster II Multi-ratio Spray Gun with great results but couldn't resist picking up some of the TW Hyper Foam at Costco today for 128oz at $15. The TW dilution recommendation is 2 to 1 while the Maxi Suds is 5 to 1.