There are several different brands and as far as I know all of them are good and have a lifetime warranty. I have one on my boat and it has served me well as I launch by myself much of the time where I can't use a courtesy dock. If you install your own, get someone to help hold it as you put it on. You'll need to clean the area with acetone, hold the shield up to the boat and mark around its perimeter, take some scotch brite pads and rough up the area, reclean, then install the unit. It isn't hard to do but the second person will make the job a lot easier.