Not as great as I hoped but still good
I purchased these to put on while riding in Florida in 95+ degree weather while in all my gear, hoping it would help keep me cool. It does deflect some air up to the rider, but not as much as I was hoping for. Same with keeping the air off when it's cold. Good but not great. They're worth purchasing but don't expect a huge difference.
The install went smooth but it takes some trial and error to get them snug enough to not move in the wind but not so tight as it's hard to adjust them.