For those with shoulder issues, you may need to fully unload the shoulders and it's only possible with "pedal-forward" and Dutch/cruiser bikes. Additionally, you need the shoulders fully unloaded if you think of doing longer rides.
Like this, unbelievably comfortable! It's half-way to recumbent bike but still considered an upright bike. You should at least give it a shot. It's worth the money for those who do needs it.