Oh, man, you are asking the wrong person for cons on the P90.
I love mine so much. I've had mine for about 6 months or so, but it was the same model that I qualified with as a security guard back in 1993 or 1994.
Pros:
- It is built like a tank and can handle any load including +P.
- It is utterly reliable. I shoot a lot of gun show reloads and never, ever, not even once, have I had a FTF or FTE.
- Accuracy. It drills a ragged hole into the center of targets at any SD distance.
- It is big and beefy. I have big hands so this a plus for me.
Cons:
- Low capacity. It's 8+1. There are other .45 with greater capacities.
- It's big and beefy. Concealed Carry is pretty much out.
As far as feedback, nothing special needed for this gun. It just works.