I own the 9mm flavor and I am thouroughly impressed.
Front Fiber sight is awesome with the solid black notch rear.
Trigger is smoother than std models, as far as accuracy, it is far more accurate than I am capable of being.
I have been used to a G17L which is close in dimensions to the Pro.
I prefer the Pro, ergos are awesome, grip wise, gun balances very well also, the G17L tends to be muzzle heavy, for me anyway, not so with the Pro. Grip angle has alot to do with target aquisition and the M&Ps in general are faster for me, I compared the speed from holster to target and first hit with the G17L and the M&P Pro 9mm.
The Pro, for me, was consistantly faster from holster to first shot on steel at 7 yards. Average of 5 strings with the Glock was 1.37 secs. the M&P was 1.28 secs.
Not a blinding difference, but it proved a point to me.
I have been shooting Glocks for 18+ years, I am a convert to the M&P.
I love Glocks, great guns, for me however, the M&Ps have proven to be a better combo for the way I shoot.
so I kinda got off on a tangent, but to directly answer your question, the Pro in any flavor is a great, accurate and reliable gun, has been for me anyway.