I'm actually still leaning more toward a S&W revolver. Great guns.
I've had a Buckmark for 7 or 8 years now and had a S&W m18 for about 5. The Browning doesn't see much use anymore.
The Buckmark functions well, had a couple hangups, but not many. As with most my rimfires, I don't clean mine much either. Accuracy is fair, 1" @ 25yds with me driving.
I'd probably trade it off if it weren't so much fun to unload 10 rounds in a couple seconds at a streaking stray cat every once in a while.