I stayed for a couple of weeks whilst I was working in London. The location is great - lots of shops, restaurants and public transport options within walking distance.
The bed was very comfy and the water pressure and temperature in the shower was great. Having access to the kitchen and a little bit of fridge space was really handy as I was there for a couple of weeks.
I'd definitely stay with Donovan again if I was looking for a place to stay in central London.