Having seen on you tube how to clean my suede jacket, I decided to give it a go and ordered this little brush, together with the gum, the sponge, some cleaner which didn't arrive yet and some spray for color reactivation.
I used just the gum and this brush on my cobalt blue jacket (which had a shiny grey collar from wearing it to much) and after half hour of work on it, my jacket looked almost like new - given that I'm no expert in suede cleaning, I'm very happy with the result. Didn't actually need any of the other things I ordered. The brush and the gum did the job very well.
The brush feels solid it is well made and I think it can be used in 4 ways (can't figure out what would be the fifth one the previous reviewer mentioned). Based on my first experience with it, I can only recommend it highly.