I've had a SuperNova for about 15 years. Bought it because at the time it filled a couple little holes in my accumulations. (it checked a few boxes on the viable excuses to buy it list) I ended up using it to shoot Heavy Metal division in 3-gun and in stand alone shotgun matches. Used it for that for some years, then it became my loaner gun for people who wanted to give "action" match shooting a try. Also loaned it to people to hunt with. So it's seen lots of use and abuse with no issues, though it's far from stock anymore.
Besides the obvious, them being ugly rattle-y black plastic and all, my only complaint is the "fatness" of the receiver. When I walk/hunt with a shotgun I always carry it, usually one handed, gripping the receiver. The Nova/SuperNova is juuuust a tad fat for my liking for that. (also sold a Beretta real quick years ago for that same reason). I probably wouldn't even notice if I didn't have other options.
(After typing I realized I've had a Moss 500 for about 35 years that pretty much lived the same life. Bought for no reason other than a friend needed to get rid of it. Pistol grip only. Kept that way a while, then put a stock on it and a rifled slug barrel and hunted with it for years. Then it became a loaner gun, has been a "stage gun" in shotgun matches, eventually became a house gun, hanging in the basement stairwell under a coat, hopefully never to be used again, other than taking it out every couple years to test fire it.)
I have way too many shotguns and it's funny I've started to get nostalgic about wanting to hunt with them again. Despite all the time I hunted with them, wishing I could use a rifle.