I couldn't make my mind up to get one with or without a back on it, however decided to get the one with the back rest. Felt safer seated whilst showering. The seat did not slip or slide whilst using it. I have this on its highest setting and it's ideal. My knee gives way a lot so this item will really help with safety when showering. Folds for storage, however I have left mine in its seat position in the shower and it looks fine. Delivered two days after ordering. Will certainly check out Essential Aids again if I need any other items.