We had the Sunguard on our Dynasty and loved them. (4 years) When we bought the Executive the first thing we did was have them installed. The RV Toy Store in Palm Springs came out to our campsite, measured, came back the next day and installed them at our campsite. They are now 5 yrs old and look like new. They also come with a nice padded bag to put them in when not in use. We full time so they are on a lot in all kinds of weather. We installed the snap type but I would recommend the twist locks. Also, have the corners wrapped to make it easier to install when it's cold outside. If you need a pic of what I'm saying, let me know.....Dennis