I've now been using the DonJoy Immobilizer brace during my shoulder surgery recovery, and overall I think it's an excellent product. It's comfortable, intuitive, and, most importantly, it doesn't make day-to-day recovery any harder than it already is.
One of the biggest positives has been how well it integrates with my Breg Polar Care Wave cold/compression system. I can easily undo the necessary Velcro straps or clips to position the therapy pad and perform my prescribed exercises without having to completely remove or disassemble the brace. That may seem like a small detail, but when you're recovering from shoulder surgery, minimizing unnecessary movement is a huge plus.
The only constructive feedback I have is on a couple of minor ergonomic issues. The small red retention ball at the end of the abduction pillow tends to work its way out and fall off fairly easily. It's not a major problem—I simply pick it up and continue using it—but it could definitely use a more secure attachment method. Additionally, after wearing the brace for extended periods, a few of the Velcro edges can start to rub against my wrist, thumb, and hand, causing a little irritation. I've been able to fold those edges back to solve the issue, but a softer edge treatment would make an already great product even better.
Overall, though, these are very minor complaints. The brace has performed exactly as I hoped, has made my recovery easier, and has worked flawlessly alongside my cold therapy system. I would absolutely recommend it to anyone going through shoulder surgery recovery.