I have a Kahr CW9 and it runs ok. The mags are wonky, and sometimes the first round nosedives, especially the 8 round mag. The mags are well made, but the design holds the top round at a weird angle relative to the round under it. Once I get the first round chambered I have not had a problem.

I strongly considered the Shield and have shot rentals. It has some advantages with dovetailed front site, non-weird mags and a shorter trigger pull. Disadvantages are the higher weight and shorter barrel for a gun that is almost identical in size.

I would like to get one eventually and I really like my M&P 45, gritty take-up and all. I'm not fussy about triggers and I think too much is made about them unless you shoot bullseye. I will agree that pull length affects the ability to shoot rapidly, but I never tried to measure the difference.