Of the half dozen 9mm PCCs I own my MPX SBR is far and away my favorite. It does yeoman duty shooting USPSA PCC division and is just plain fun to shoot. Soft shooting and reliable, it does have a few drawbacks, like stupid expensive magazines and a tendency to be hard on triggers. Sig is now shipping a competition version with a Timney trigger designed for the MPX, although I have settled on a Hiperfire. MPXs have also been accused of being too gassy when suppressed, although I have no complaints when using a Silencerco Omega 9k.
Based upon your review, if I come into a windfall, I will get one.
I do no competition shooting at all but I think it would look good in my vault.