It is both my duty gun (we are a M&P Pro series Dept, unless you get 2 of a gun - for need of a backup duty gun) and comes optics ready from the factory - also its my everyday Carry gun - so a polymer gun is lighter (I used to carry a 1911 and the difference is noticeable - so is the extra 7 rounds...)
If I had an assload of $ I would have probably bought a HkP30 - but the idea of buying 2 of them - then modifying them to fit an optic did not appeal to the family budget (effectively $1300 each after optic mod, where my CORE was $600). The P30 and M&P are about the only poly guns that I find my hand just fits so nicely with -- the other aspect is the Hk mag release paddle and I are not friendly - so it would have been another bunch of money for the 20k or so rounds to get some decent muscle memory with it.
I have come to love polymer frames for the fact I can stipple them to make them easier to grip.
