The shoulder straps are very comfortable, the additional back makes carrying it much more pleasant, but the materials from which the whole thing is made are not of the best quality: the back sweats (this back does not breathe at all), but the biggest flaw is the thin, slippery straps, which. They do not hold in the buckles, basically not allowing you to tighten the cover firmly. There are no alternatives on the market and in general the idea of shoulder straps for hard cases is brilliant, but I would like to see it better made.