I've got a Bajaworx Dakar on my KLR650. I like it better than the stock screen. At 5'11" it pushes the air to the top of my helmet at highway speeds. No buffeting, but still quite noisy. If I lean forward or slouch down it's nice and quiet.
I'm going to mess around with a spoiler or try raising the screen a bit.
You can see photos of my KLR with Dakar here: