I booked the Cloister Inn via the BA Holidays website and received a great rate for a stay a couple months ago for my daughter and I. The Cloister Inn was clean, neat, orderly and well situated. The inclusive breakfast was exceptionally well done and there was a high speed computer terminal in the lobby for the free use of guests. There is a Tram stop 5 minutes walk away and the Charles Bridge is less than 10 minutes walk. The rate via BA Holidays was better than other booking mechanisms that I checked.
http://www.cloister-inn.com/