I've owned a 9mm 225 police return, a used 229 in 40 and a SIG Pro in 40. All three were 100% reliable for me, and generally good guns, they just don't fit me quite as well as I would prefer. If I was issued a 229, I would have complete confidence in it, but for my personal carry weapon, it's not my first choice.
But on the guns, the 229 is a bit heavier than the very similar 9mm-only 228. I never noticed an overwhelming difference between the balance of the 228 and the 229 but some folks claim there is a considerable difference. They both feel pretty blocky in general to me but if I were seeking a 9mm, I'd probably go for the 228 rather than the 229. The 239 just feels... well... Like not what I'm looking for either.
The 225 is a single stack and mine was probably the most comfortable of the SIGs I've owned, but I sold it to a guy that was just dying to have mine.
I have no issues with the SIG Pro. We bought the SIG Pro and a Glock 23 for my wife to figure out which she preferred... Well, and I wanted to play with one as well.
She preferred how the SIG felt in her hand to the Glock, but preferred shooting the Glock with the same ammo. I don't know the weights off the top of my head, but I'm sure the Pro is a few ounces less than the 228 or the 229 and that might be important on a carry gun. I believe the Pro has pretty much identical dimensions to the 229.