My Mbrace arrived today! I just played bass for over an hour with no shoulder pain! Now I just have to build my calluses back on my picking fingers but I'll use some super glue for now.
@bradlake not sure if it's the angle of your picture but it looks like the guitar on left is on a short stand, so you'd be able to play sitting down. If it is a short stand, do you know what brand it is?
It would be awesome if I could find a stand with wheels, so I could move around with it. I might try to remove the seat from a chair that has wheels and attach a stand to it.