I can't speak to durability because our set is on order, but we traveled to the construction site and my husband who is pretty picky was impressed with the units. We ordered the deck and four step units. My husband set up the steps/deck himself and found it very easy. We liked the aluminum construction since it was very light weight -- about 100 lbs total (steps and deck) with the largest piece (steps only) easily handled at about 40 lb. Not having a lot of small loose parts was also something that influenced our decision to buy. The steps alone would have made exiting the RV much easier. I just wanted the deck and husband let me have it. Again you will need to hear from someone who has had the steps for a while to speak to durability, but after seeing the steps I am not concerned at all. My comments may not help much but will at least bump your thread.