Isobel Butler
Google
amazing hostel!!! perfectly located, about 2 minutes from the leaning tower, and close to all the restaurants in pisa too. the beds were relatively comfy and cool for a hostel, and the staff very friendly. you have a key code so you can access the hostel at any hour. there is a good fridge, ping pong and a nice roof area. showers are decent with hot and cold water every time i used them, and a cleaner comes every day.
i arrived after midnight, and had to message the property on booking.com on the day of arrival (no reply on whatsapp), but after that i was easily able to check in later.
one important thing is that when you arrive you have to pay the city tax of €2.50 per day that you stay.