These actually work really well as long as you clean them right away. I have worked with the 'ready to use' kind of foams that come with a nozzle and these make everything so much eazier as well as saving you money if you're going to use more than a can or two. I mainly bought them because I'm in a wheelchair and couldn't get above my doors and windows with the old stuff. This, holding the can upside down on the gun and having a decent length tube solved my problem. Happy with the quality for the price.