The glass-lens consumer Polaroids are also capable of respectable performance. These (Models 100, 250, 350, 450, and a few others) had a Cooke Triplet type lens similar to the Radionar on my Kawee Camera, which is capable of very respectable performance stopped down past f/8. And since the Polaroid lenses are f/8.8 wide open, and stop down to f/42-f/60, depending on model, they're capable of doing just fine.
I've just gotten a 350 (thanks, Murray!), and once I get the corroded battery connectors replaced to bring the shutter and timer back to life, I expect to get images that will be more than worthy of keeping Type 665 negatives (but I'm going to test with Type 667 first). My only major wish with these is that they had a standard cable release socket instead of requiring proprietary Polaroid accessories for both cable and self-timer. At least the glass lens versions have a metal body and tripod socket...