Andrea's place is exactly as he describes it, seconds from the Duomo and very close to a lot of the big sites in Florence. Literally, you walk out of the place and the Duomo is right in front of you. The place was very clean, lots of space to move about and get comfortable, full kitchen if you need it, good size bed, and a living area with a small TV (we didn't use this). He also has a washing machine and a clothes line outside for drying (common in Europe).
Now, staying this close to the Duomo/Bell Tower has it's price because we were woken up every morning at 7:45am on the dot from the bell tower, and then promptly again at 8:00am and every few hours after that. The bells are going off a lot, so if you are not an early riser, this is something to consider.
We also were met with unfortunate circumstances as there was construction in the building, that felt like was right next to our unit. They started around 7:30am and we were woken up to drills, pounding, falling brick, our water turned off (not great for needing to get ready in the morning), noises even my headphones had a hard time drowning out. Luckily, this was a non-issue for the last two nights of our stay because it was the weekend (although we still had the bells!), but this was a major set back for us for the first two nights.
The wifi was also really spotty and not very reliable but if you have an international plan, not a big deal.
Overall, this is a good place to stay we just experienced some unforeseen issues. I would still recommend this place especially for the location and the size. It really is a good value.