Sorry for problems some have had but I've had a Canvas Store cover for the last 4 years. I had to have it recut as it didn't fit properly over the arch since my 44' sailboat is a semi-custom design.
For $3000 it's a good value, it comes down to the toerail and doesn't cover the Awlgrip hull which could cause blisters.
There are several others at the marina who have one and are pleased. Steve comes down to the marina and takes measurements for unusual designs.