I recently purchase the Poly-Cotton cover for my 18ft Sea Pro with a T-Top. The cover is an excellent product. Very well made with a lot of thought going into its design. I installed it by myself and it took a few minutes to understand how it installs. Now that know how it installs it is quick to take off and put on. I use a PVC pipe that mounts from the bow handrail on one end and to the center console rail on the helm end. I use a support pole underneath it to give it a upward curve to it. This allows rain water to run off and not pool up on the cover. And by the way, we had a heavy thunderstorm with hail yesterday. The cover worked perfectly. I would recommend this cover to anyone.