I used to work with the elderly and a few of them had one the main downside was having to sit and wait for it to empty before opening the door - can be a bit chilly ......
One of my ladies decided to open the door before it was empty - oh my how much water??!!!! had to get in industrial driers she lived in a bungalow so the whole of the house was flooded - a walk in shower with a seat is a much better option and not so expensive