Going to have the dealer install all 5 on mine in the spring. One of my previous trailers had them on it and they are nice. My previous trailer didn't have them and I hated it. I was going to have them installed, but I didn't keep it long enough. I lived all last year without them on my current one and not doing that anymore.
2017 North Point 375BHFS
2015 Silverado 3500HD Crew Dually Dmax 4x4
If you are mechanically inclined or have a friend or two that are, they are an easy DIY install. I put one on my 29RKS last season in an hour. Do a search. There are a number of posts on this forum on how to do it.
Had two put on my 2017 26xd by a local shop that works on rvs. Had them on my prev cl c that I had for 11yrs. After 2 trips with this new one I saw how much trash got on top of slides it was a no brainer to have them put on. I am much too old to be going on the roof to clean the slides off. Amazing how many rv*s do not have them
We ordered the installation of two slide toppers from the dealer prior to our receiving our 2018 Greyhawk 29MV in November. They were expensive but we wouldn't have it any other way. Now I don't have to carry an electric leaf blower and clean the tops of the slides every time they are retracted. And I didn't feel comfortable standing on a ladder juggling the toppers or drilling holes into the side of the MH in freezing cold weather or wind. To me, there are somethings better left to the professionals.