Received it yesterday as I only had a small opportunity to test it I can only give a first impression The optical quality is very very good, not perfect but very good, for the most part for the price . (5 stars out of 5 at this price) The build quality is fantastic, they feel very solid, are covered in rubber armor and are totally waterproof. (5 stars out of 5) Comfortable, pretty good, a bit stiff but I expect them to loosen up over time. (4 stars out of 5) The instruction manual for these…