Pros: Great value, Quality, Easy to use
Cons: tends to creep around a bit
I often notice this guard tends to ride around on my neck a bit (spins and bottom pokes up over jersey), but that may be the case with other guards as well.
It is otherwise very comfortable when it is in place.
It might be worth trying out the 9k guard to allevate the above problem with riding. Looks like it would be a more contoured fit.