10L unit is very convenient size for my small garage. It cleans well but there is a couple of annoyances. The cleaner comes with a hose, but it doesn't have a barbed fitting to attach it to the ball valve. I had to buy it myself. Another thing is a bug with the timer function. If you stop it in the middle of cleaning to check progress and then continue, it resets the timer back to the previous setting. So you can't actually use it like a pause/play button.