The only thing I ever noticed different between 357SIG and +P+ 9mm, was the 357SIG was a little louder. Either way, either of them will deafen you indoors.
The 357SIG isnt the big bad wolf some seem to think it is, it really is just basically a +P+ 9mm, and shoots the same as one in comparable guns.
Things I never had an problems with 357SIG are...
Shooting them. They are no harder to shoot than anything else.
Muzzle flash, any worse than anything else. I dont know what people who say they are flashy are shooting, but I never saw it with factory or reloads, even indoors.
Feeding. They feed fine, and better than some others. The pistols I have had the most trouble with feeding have been 1911's in .45acp.
Bullet setback with factory ammo. Then again, I never chambered a round more than twice to ever really see any. Reloads were never an issue, as they were compressed loads, and there was nowhere for the bullet to go but out.
Reloading them. They are as easy to load for as anything else.
About the only bad thing I can say about them is, ammo and bullets for reloading got real pricey there for awhile, and my Glock 31 was beating itself to death (something my SIG's never had an issue with).
With all that said, I got rid of all mine, and went back to 9mm. 9mm factory ammo is a lot cheaper, and so is reloading for it, so I get to shoot a lot more for the same money.