5-stars from me because of the great value for money. It's a decent sized room, great for a good night's rest. The host is very welcoming and friendly. The location is great, steps away from Canada Water station, that runs the Jubilee Line which will get you into central London within 15 minutes. Also ideally located for Canary Wharf, Greenwich and the ExCell area.
However if you're fussy, this may not be the right place for you.