Brush device to go in gutter - any good?

EssexExile

I had those downpipe filters mentioned above in my gutters, the balloon type things, we're surrounded by trees and after every good wind & rain they blocked with leaves. Sometimes they had to be removed and cleaned every month or two. So I experimented with hedgehogs in the gutters that are easy to get to. So far I've found that they have to come out to remove all the debris every few months, not much of an improvement I'm afraid.