It doesn't get any simpler than this.
I was leary to begin with about a cover with only 4 clamps. After installing I took a 2000 mile trip. after about 500 miles I tightened the clamps and went on my way. When I got home all clamps had stayed tight. Went through a lot of rain but none got into the bed.
Excellent Excellent Excellent cover
It is much nicer than I actually expected. The rails are strong, water tight and the material is thicker than I expected. Also inside the material are secured cross bars running across under the material to keep it flat, which wasn't in the description but an obvious plus. The top is almost level with the bed on the sides for a cleaner look. The top does not flop at all, its very tight. I could not be happier and I can't think of any improvement.