Because the bag for about carrying Keyboard YAMAHA PSR S550 is a little too large - especially in height - she has thus the advantage of being able to wrap up the keyboard stand equal with. Thus, the strap, so naturally a little heavier. Better would be two front pockets instead of one - there is just take Miscellaneous (sheet music on the one hand - cables, adapters, etc. on the other), but ... ... Price / performance ratio is optimal, but why three points
