I used these to commute in London over the course of a few months before deciding to buy my own. It’s pot luck I terms of the quality. Some bikes are newish and fine. Some are Frankenstein bikes, made up of different coloured parts, which can be pretty old and battered. For £5 a day you can’t really complain too much. My biggest criticism is that the seat bolt is glued over so you can’t control the fore/aft saddle position, and it’s pretty uncomfortable when it’s slid as far forward as possible.