The last time I bought their "complete" kit it lasted me 2 years with frequent waxing, probably a lot more than I needed to. I looked at switching to Klasse, but was unsure of how "different" the results would be. I'm by no means a sackrider, but Zaino's worked good for me. I bought their new scratch remover stuff too, I'll be posting a review on it once it gets here. I have a few spots that need attention.