I would go without. A few of my friends have slides and everyone has had problems. Everything from minor water and dirt(from roads)leaks, damage to the floor where the slide moves, to the slide not going in or out. Seems like at least once or twice a year I am helping either a friend or a fellow camper trying to get the slide out or more often getting it to go back in so they can leave. Aside from mechanical problems and adjustments make sure you check and see if you can access what you need in the trailer with the slide(s) in. Some trailers you can not get to the bathroom very easy with the slides in while you are on the road. I think the idea is great but personally it isn't worth the hasle for me. Just look at this site how many have problems.