I was a guest on the first day of opening for YellowSquare Florence and everything was so good! The location is a 15min walk away from the central train station if you don’t want to pay for a tram ticket (1.5£ for 90min), and the nearest tram stop is also only a few minutes away. There are some restaurants around the corner as well if you are looking for a quick meal.
For the accommodation itself, there is a bar and working area at the lounge where you sit and do work or just have a nice drink with friends. There is strong free wifi everywhere as well. The toilets are well equipped with hair dryers and body shampoos for your use. The bunk beds are also clean with charging ports right by your bed and even a personal light too. There are also lockers in the rooms where you can use your own locks to keep your personal belongings when you want to travel around, but if not I believe they provide locks at a small fee as well.
Overall the experience was very pleasant and the staffs were friendly and gave tips when approached and if you have any queries they are very friendly to help!