The PS90 and by extension the P90 are neat contraptions. Had a post sample P90 for a half dozen years and it was my favorite machine gun in the shop. Darn thing never had any reliability issues and was super easy to shoot. Only issue which was warrantied by FN was a busted stock due to the extra force from running suppressed. The gun never stopped running during that time just one of the pins holding the two sides of the stock together was obviously broken . If running a can on one I would highly recommend updating to a heavier recoil spring. Light weight, reliable, high capacity, accurate and easy to shoot; what's not to love. The 5.7 is by no stretch a rifle round but for it's design goal (lots of rounds on a close target accurately and fast, AP if needed) absolutely a winner. Love the 5.7 round and in the pistol it is another neat package.