I see a huge amount of products with reviews that slam products. I often wonder if the writers of these reviews ever find anything any better. Personally, I've not found anything any better than these crown stops (in thier proper application). As far as I know, there are no other crown stops that fit this saw. As far as accuracy,,,after determining the distance from the wall to the top face of the crown, I rip a scrap (1x whatever)  exactly that wide. If it's 18 inches to 24 inches long it will lay all the way across the saw and I can set both crown stops against the scrap and tighten them down. I've never had one to come loose or bend. Most crown is fairly light and using the upside down method of miter cuts demands the accuracy afforded by some kind of stops or a jig like the Bench Dog.