I keep my sheet music in there as well as the extra strap it came with (as to be worn as a messenger bag)

I haven't used the single long strap, but the handles and bookbag straps are great

It also came with, as previously mentioned, a strap as to be a messenger bag as well as backpack straps to leave you with 3 different means of holding your case

The straps are easy to use and well made, but the shoulder straps come up a little too narrow on my upper back, meaning that lugging it around on my back for more than a half hour gets uncomfortable.

I basically have only one hand free because I'm always holding the right strap up.