It's a lovely one bed apartment, nice and roomy and has a really relaxed feel to it with plenty of useful features (washer/dryer, coffee maker, microwave etc). Set well back from the road so it's super quiet. The local cafes, bars and restaurants are fantastic so it's a great base for a couple. We've got an 18 month old as well but she was right at home so it's great if you do have a little one - worth noting there's no bath but baths in the sink were a hit!
The whole Oltrarno area is really lively and feels cool without trying too hard - it has an authentic local feel to it. Super responsive hosts too: I'd forgotten to ask for a high chair for our toddler but they came straight round with one for us. Really great place, lovely hosts, amazing local area. This was our second visit and we will be back!