if its gonna stay in the chassis, then great, it just sucks a little less. i bet it still ends up being more expensive than a used ruger pc-9 or pc-40, without the added benefit of increased velocity, potentially enhanced terminal ballistics and more recoil management.
as for the compact size, yer basically adding weight, size and money at a perfectly good pistol and saying that its something other than a pistol with a dot. unless i train with it more than i do my pistol, my presentations are not going to be as quick or intuitive and i sure as heck wont find my dot as fast as the standard pistol sights that i've put tens of thousands of rounds through. shot an open gun once and spent most of the time trying to adjust my grip to catch the dot in my field of view. finding a dot at arms length with out the benefit of a stockweld is not necessarily easy if yer not doing it all the time. and the chintzy wire stock they have wont do half the job a real pistol caliber carbine or subgun stock would do.
if all you've got is your pistol, then your money is much better spent on more ammo and another afhf class.