We had a dock mate with these covers on a Morgan OI in Kemah, TX. The cover did an excellent job of providing shade, and it was easy to move under it. If you were at anchor, so that it was
always bow to the wind, it is ideal.
But -- at a dock, wind on the beam, it is a magnificent sail. Our neighbor had more than one of the battens break in the second (or later) summer(s) when hit by summer thunder showers or sudden squalls. And even in an average breeze, on their starboard beam, it was very noisy.
This was about 10 years ago, and the product may have improved to solve this problem.
And as always, ymmv!
