We bought a sunbrella cover for our CD22 from Angola 2 years ago. I think it cost about one boat unit, including shipping and options. Ours had a modification for the radar on a pedestal; more thorough closure at the outboard; and it was longer all around to cover the gelcoat stripe below the rubrail.
I thought the value was great, the workmanship never left us wanting, and it was great to be able to cover the boat. The fit was perfect for a stationary trailer cover, and there were no areas where I felt the cover would damage the boat by chafing. We would put the boat away clean, and the cover kept the sun, dirt, pollen, bugs, and bird droppings away. I wish I had a similar cover for IRENE. I think it's a great way to reduce work and reduce wear and tear.
Good Luck