I have a 20 gauge BPS, with 26" invector plus chokes, plain receiver, not "engraved." I love it.
Here's why:
It fits. The stock's drop at comb and heel are less than other 20 gauges I've hoisted to the shoulder. I didn't like the fit of a Rem 870, or a Browning Citori Lightning. The only one that came close was a Browning Citori Skeet grade 20 gauge. It had regular Invector chokes and didn't pattern well with anything tighter than improved cylinder.
I love the BPS's top tang safety. Fast for wingshooting. Once you have a tang safety shotgun, you have to wonder why in the world would you have a safety behind the trigger (slow, not ergonomic). That's ok for more deliberate duck, turkey or deer hunting, but not grouse ("pahtridge" in Maine).
Overall quality is excellent (call it pride of ownership). The fit, finish, smoothness, parts, blued steel and nice straight grained walnut is a marriage of synergistic proportions). To me, it also looks good. Nice lines throughout, and particularly in the receiver area. It is designed well, and with the "eye" in mind too.
I bought mine used for $270 about 8 years ago. I've sold all my other 20 gauges, if that let's you know how much I think of this shotgun.
That being said, I DO have a smoothed-out Rem 870 express magnum in 12 gauge-3", with a Pachmayr rubber forend, and a Remington walnut "special purpose" monte carlo stock, which I use for duck and turkey hunting (also have a slug barrel for it-if needed someday). I don't hate Remington 870's. I DO think my 20 gauge BPS is perfect for my upland bird hunting needs.
One more thought. Get a BPS with invector PLUS chokes, not the regular invector chokes. The invector plus chokes were designed as second generation chokes by Browning after they realized the invector chokes didn't pattern well with tighter chokes. The invector plus chokes are longer (about 2" long), or about the same length as RemChokes (which is a good chokes system). Get the invector PLUS choke system, NOT the regular invectors.
The BPS is a great shotgun.
----------------------------------------------------------------------------------------
Just another reality check, that the "proof" really IS in the pudding !
Just a comment: The saying is, "The proof of the pudding is in the eating." It's not "The proof is in the pudding." It's funny how often that saying is bent out of shape.