Which ones did you have put on, we are looking?
We had a guy that would come every November and clean them for $50, he didn't come by last year... fate unknown.
Had it done when we had eavestroughs replaced so not sure of the brand. Definitely recommend it though. We have a pine tree right next to one roof and before this they would clog all the time. I saw some in Costco a while back that looked identical and also quite cheap.