I've never rated foam.
I bought the Autobrite HD 2 years ago with a load of SSP and a bottle of yellowy foam (the next escapes me). The foam is nice and thick and sticks to the paintwork for about 5 mins - but it does bugger all other than make a 2" deep foam pit for me to wade through when actually cleaning the car with a (god forbid I say it) ... sponge.
I still use it though - just because I paid for it. But when it runs out, the lance is going in the bin - big waste of money.