Stayed here for 5 nights, using it mainly as a place to sleep nothing more. very close to train station - good and bad! Train station are is a dodgy area with lots of people hanging about looking for change, drunks etc but thats standard for most cities they were a nuisance nothing more. Literally 10 minutes walk from leaning tower and other local sights to see are not far from the Guest-House. We stayed in a room with 2 bunk beds and nothing much else in there, was bathroom and shower was nice and hot (not guarenteed in some cheaper hotels!) but no kitchen or fridge to chill water before we went out.
Basically its very well placed, cheap and simple so if thats what you need then this is a good shout as really in Pisa theres not much to do after a day or so exploring but the train goes to sienna, florence, lucca, livorno etc all wonderful towns/cities :-)