Is the manual device just the safety lever with a big notch cut out of it? I've got one of those sitting on my shelf, waiting for a rainy day to be installed. Even with it installed, I'd still rather see the bolt held open after the last round, much like a pistol.
Anyway...
Recoil has been non-existant. Every time I take it to a range, I get lots of questions about it, and I usually just let people take a few clays with it, just to try it out. Most people say they want to buy one for their wife since it kicks so little.
It's a smooth gun, with very few problems (the most common is not getting the mag locked in, but you learn how quickly enough). Other than that the only problem I had was re-assembling after cleaning was a bit tough. Since then I've learned the gun and have no problems with disassembly, re-assembly, cleaning, firing, etc.
Just remember to adjust the gas port for your type onf ammo, and it'll cycle flawlessly.
It's been a really great gun.