Since it's near impossible to find fitted covers for an old 87 Squarebody I figured this would be as close as they come. There is a bit of slop as expected since the measurements are just beyond those of the seat and seat back. A couple heavy duty stitches on the sides of the seat will pull it in snug so you don't have the sides flopping. It would have been nice if the seat bottom had the same 2 cross straps as the seat back to help pull that in a bit but that's not an end all deal breaker by any means. The seatbelt slots are nearly dead on so it tucks right in where those are. The only concern I have for durability is going to be the plastic buckles used. They feel a bit on the cheap side and during hot summer days I feel like those will be the weak point. Otherwise the fabric feels more durable than others I have tried and is nearly on par with the 35 year old one that was in it prior.Overall I can say it looks nice, has a fairly tight fit, and seems to be built fairly durable but only time will tell on that.