I rented from my local Tesco a couple of days ago. Online booking worked well. The code worked without a problem. The machine is simple to operate and produced pleasing results. I probably shouldn't admit in a public forum how dirty my carpets had become, but they regained something of the colour that I remember. It works better in bigger open spaces, and less well around sharp corners, sticking-out radiators and other awkward spaces, though the hose attachment helps with those. In 24 hours I managed to do all the hallways and stairs in a four story house. No more. Then again, because my carpets were filthy, I had to go over a few sections several times. I was quite exhausted by the end of it. Don't overestimate what you can do in 24 hours.

One last thing. I used 4 litres of the carpet detergents (£19.99!). I've been very suspicious of it in the past--because I expect that they make more money from that than the machines themselves. Maybe there are cheaper detergents, but I can't argue with the results.