My blued P90 seems to be indestructible. I bought it used, in kinda beat-up condition, strictly because I wanted a reliable .45 (tired of endlessly tweaking 1911s and clones), cheap, that I could use as a range blaster. The fact that they have a reputation for better-than-average accuracy didn't hurt, and being a big Ruger fan in general, I knew the trigger pull would probably be fairly rough, but usable with practice. It did not disappoint me on any of the above points.
It showed evidence of much firing and carry/knock-around use, but internally it was sound, with no peening or other obvious problems. On my first trip to the range, it took a full 50 rounds for me to get used to the creepy trigger action, but once I realized that a gentle squeeze would get me a shot near center, I just kept my focus on the fundamentals and did fine. In fact, it seemed to be shooting really well, so I placed a new cardboard silhouette out at 25 yards, and deliberately fired a 5-shot group with my hands lightly resting against a vertical post to steady my aim. Imagine my surprise...
I then started buying spare magazines for it, searching gun shows and local shops for deals. Some were priced right, some weren't, but I now have about the same amount of money into magazines (10 total) that I spent in the original gun purchase.
Current ammo prices are killing me, but when I can afford to shoot it, I'm always pleased and often surprised at how well it shoots, and how well I can shoot it (not always the same thing; sometimes I let it surprise other folks, too). I finally broke down and cleaned it a month or so ago, for the first time in over 400 rounds; dirty, but still functioning just fine, and the post-cleaning inspection still turned up no excessive wear or other problems. It has never had a stoppage/malfunction, even with wide-mouth hollowpoints and a few boxes of +P defense loads.
They are not highly regarded as slick/smooth guns, but they shoot reliably and accurately for very little money. I'm very happy with mine, ugly as it is (missing one mag in this pic):