I had a great stay at the 6 Keys! The check-in process was great, apart from the fact that the receptionist didn't speak very much English, and I did not speak any Italian. I did not remove any points for this as I was a tourist in a foreign country and the least I could have done was learn the basics of their language before hopping on a plane there; however, Google Translate sufficed for this instance. The room was clean, had a refrigerator, a coffee machine with complimentary pods, and an assortment of pre-packaged breakfast items. The property was located in a good location: 2.1km walk to the airport, 1.3km walk to the famous Leaning Tower of Pisa, 500m walk to the Pisa Centrale train station.
My only legitimate complaint was that my bathroom was not attached to my room. I had to leave my room and walk through a common hallway to access my bathroom. This was not advertised anywhere in the listing, which was unacceptable. I had my passports, laptop, tablet, and a few other valuables with me, which meant having to lock the door each time I had to use the bathroom. I only subtracted one star for this. Everything else about my stay was terrific, and the price I paid was significantly lower than anywhere else. I plan to return to this property the next time I visit Pisa, although I will be sure to request a room with an attached bathroom!