Overall goo quality. The upper hold point ripped quite fast after the purchase, I guess the friction between my back and the strap itself caused the ripping. The zips on the bag compartment ripped quite easily too. The shoulders. The padding on the shoulders restrict movement a bit, but the soft part on the back is comfortable!
Would recommend as a cheap alternative if you want only the sheet music compartment and backup straps in case the need arise. Shipping was perfect!