I was lent an unaltered Saiga 12 for an extended T&E. I wrote about it over on THR.
For reducing threat levels in one's immediate vicinity, a fine choice.
For trap, skeet,etc or birds, not so good.
I did not like the sights, lack of a bolt hold open device or the trigger.
I did like the stone cold reliability, ruggedness and super soft kick.
It ran everything I fed it. from 7/8 oz target loads to 1 3/8 oz Brenekkes.
It was fun, especially plinking at a coffee can with slugs.
IMO, not a good choice for GP shotgun, but good as a mission specific tool....