I have an outterwears cover and so does my Dad (Jack in Alaska). They both work good. Make sure you ask for the water repelent one when you order as I think they have two different ones.
I do have two problems with mine now. One is that its dirty and looks like crap, but its red and the dust really shows. The other is that I have the BHAF sitting on the old airbox posts and they rubbed a couple of holes in the prefilter. Nothing I can't live with.