I've had my 45 Shield for a couple of weeks, and I've been impressed with this little gun in every way -- much more so than I expected. The recoil isn't bad at all, considering you're shooting a small, lightweight polymer 45. As others have said, it's very controllable. I also have a Springfield XDs 45, and to me the Shield has less perceived recoil.
Honestly, the 45 Shield is quickly becoming one of my favorite potential carry guns. If it continues to function as it has so far, I could see it becoming my EDC very soon. I like it that much.
If you're at all on the fence about getting one, I'd so go for it - especially with the rebate right now.