I've had one for about 8 years. It compares favorably to the Remington 870, though I feel the BPS is better made- the finish is better, the receiver and internals are milled steel instead of stamped.
Like another poster mentioned, the bottom feed/eject takes a little getting used to at the trap range.
The only major drawback to the bottom eject is if you want to take it to the trap range. You can't just drop a shell into the ejection port and close the slide. The slide has to be forward, then the shell has to be loaded into the magazine tube, then the action cycled to chamber the shell. What I do is just leave the fired shell in the chamber, then when it's my turn to shoot I load a new shell, and pump the gun to eject the spent shell and load the live one in one motion.
What I do is this: after shooting, I eject the shell. To load another, push the slide forward about 1/4" you can now feed a shell into the chamber with your thumb because the shell elevator fork is freed up and can be pushed upward. Its not as easy as dropping a shell into the port of an 870, but with a little practice, it becomes second nature- but your thumb gets a little dirty.