I was in London for work for 2 weeks and Martin's place was fantastic for what I needed. The location is great, and from this base you can get practically anywhwre... 5 min walk to the bus, 10 min walk to Farringdon station (which you can get the Elizabeth line directly to and from Heathrow!), 22 min walk to my company's office in Shoreditch.
The place was as advertised, and the private bathroom was super spacious. I was out and about a lot, so didn't spend too much time at home in the day, but the common areas and kitchen are great too, and never felt awkward sharing this space.
Martin was a great host too. Super friendly, and always made sure I had everything I need. Would stay at his place again in a heartbeat