S&B Air Intake

I know a lot has been posted over the last few years about air fliters and intake systems. Recently I've been seeing ads for S&B. They have a nice enclosed air box with a plexiglass cover, it has been tested to ISO 5011, is 8 ply oiled cotton, and is fairly inexpensive. I was told that GM has some issues with non-enclosed air intakes (K&N). Anyone have any experience with the S&B?
Thanks
Jeff

I have one and have been very happy with it.
never had a problem.

Thanks Dewey
Does the turbo spool up faster? How is the turbo whistle?

Jeff