This is a great little retreat. The cabin is a good size with the bed out and spacious with it folded into a sofa. Really clean, new facility with private entrance, big screen TV. I stayed during a blizzard and the place was cosy and the electric shower was hot and powerful enough.
A couple of things to be aware of: It quite a distance from tube and train stops so you may need to rely on buses. Monday-Friday the on-street parking is restricted for about two hours in the middle of the day. Also, there's a fridge, kettle and toaster but no other self-catering facilities. Would maybe benefit from a microwave.
Communication was really easy. As others have noted, it has roof windows and gets light in the morning so if easily woken you may want to bring an eyemask!