I just picked one up on Saturday, traded an old Enfield sporter for one and one of the 15rd aftermarket mags by Pro Mag. Stopped and got a 100rd box of UMC 115gr jhp at Wally World on the way home. Took it out yesterday and I was impressed to say the least!
I ran all 100 rounds through it yesterday. I had 3 jams with the 15rd mag, none with the factory 10 rd mag. I just shot the peep sights on it.
It was dead on windage wise and a little bit high out of the box at 25 yds with the UMC. I didn't make any adjustments at all. I was shooting offhand, standing. One ragged whole in the 8" target dead center, slow fire. Rapid fire I kept all 10 in 3" circle, fast as I could re-aquire and pull the trigger.
I shot 50 yds kneeling and offhand standing with nearly the same results. Kneeling slow fire just kept tearing out the center of the target, and kneeling rapid fire kept them in around 3". Offhand went well too, I'm not the best offhand shooter, but slow fire was around 3" and rapid fire was 6" or so. I was happy with that. (but I definitely need to practice more, I used to be able to do better than that)
Then I set up 6 cans of Sprite at 50 yds (gotta love reactionary targets). I managed to bust 5 of the 6 with one shot each, I had to shoot at one of them twice to bust it.
Off the bench at 75 yds I kept them about 3" (ten shots) and offhand/kneeling I kept them all in the 8" target. Then I ran out of ammo.

I was impressed enough with it that I may just have to get the .40 and .45 ones too. I think that it'd make a great economical home defense gun. I'll also be toting mine around in the field while bumming in the woods, scouting, etc.