I only stayed in Strage Uncle on my last night in Florence. Location and room are great, just what you need when you are traveling solo, a nice bed and simple room.
Bred is super welcoming, he invited me to come out with his friends for some drinks and he came back to say bye at my departure.
Breakfast is also good, you do not only get just a coffee and few biscuits for there is also fruit, cereal, yogurt and other bits.
I totally recommend this place to anyone who is travel alone. Pretty good value for money for a expensive city like Florence.