Excellent location and great value. You will be able to walk to everything and the area is not crawling with tourists, so it is a good choice. Roberto is a very responsive and attentive host and has wonderful tips about Florence. We didn’t spend a ton of time at the airbnb, but the bed was comfy and the AC was sufficient so we were happy to come back after a long day of exploring Florence.
One thing that I think is important to note: if you’ve only stayed at American airbnbs (outside of large cities perhaps), you may not be used to meeting with the host in person to check in. For this one, Roberto will meet you to give you the key, show you the place, make recommendations, etc. This means that you should have a clear idea about when exactly you will be arriving so you can coordinate your check in.