I had an H&R 20 ga youth gun that I bought for my wife. It was heavy as hell, but I got it cheap. It would not feed shells worth a flip and I quickly figured out that the shell follower was broken in a brand new gun, and that was causing some issues with friction inside of the mag tube. I got it working reliably after a little tinkering and a lot of cheap ammo.
On the other side of the coin...
Mossberg. A 20ga was my first shotgun, I have had several others. They have never given me trouble, and have always been more reliable than the price indicates. I have yet to break one, and I have done some truly stupid stuff with them that probably should have jammed them up or broken stuff. I haven’t fallen in love with any of them, but they are no better or worse than any shotgun I have had aside from that H&R. I have grown tired of most shotguns, but the original 20ga still remains, and always will as it came from my grandfather. You simply do not find a better gun. Period. There are others that are prettier, has more bells and whistles, but none better, and that’s before price is considered. Throw cost and quality into the mix together and you quickly come up with the conclusion that there is no better bang for the buck than a gun that says Mossberg on it. 500, 590, maverick, it does not matter. Reliable, affordable, durable.