We have a full Fairclough cover that we were lucky enough to get with the boat. We've installed it and removed it a couple times ourselves. The canvas was about 12 year old, so we had it restitched last year at Fairclough, and dealing with the company was great. No problems and they were generally helpful.
I highly recommend this type of cover. We worked on the boat during the winter, even on deck, and it wasn't too cold. And when we had so much snow this past year in Maryland (multiple feet, multiple storms), the cover/frame stayed in tact and protected the boat. After going through that, and seeing how so many other boats fared, I can't imagine not having a cover.
1984 Sabre 34 Mk I