We've just returned from 7 nights at Le Traverse. Pinuccia is a really great lady who checked if we needed anything each morning as we ate our breakfast - we got advice on where to park in Florence, what local towns to visit, and she booked a couple of restaurants and a wine trip for us. She's very kind and does a good job in balancing not being too intrusive but making sure you've got everything you need.
Our room was nicely decorated, if a little dark (you need to have the lights on in there during the day). The bright well-cleaned ensuite was good too. We could hear the people in the adjoining room but then that was mainly because they came in in the early hours each morning, cackling and yelling a bit. We had everything we needed in the room, although the satellite tv only has one english channel so don't expect to use it too much. The surrounding countryside is peaceful although you may here dogs on the neighbouring farms barking throughout the night. Everything was comfortable and breakfast very enjoyable (cake, jam and bread, yoghurt and fruit), and served by Alessa who was delightful and also did our laundry for us (ten euros a load).
Swimming pool is nice - not heated so you need to be brave to get in it but you soon get used to it. You have to wear a swimming cap in it which Pinuccia provides you with.
The nearby town of Pienza is walkable if you're up for it, it's 30 minutes uphill. I didn't see any taxis parked up in the town so not sure if there are any. Take the torch in the room with you if you're walking and plan on coming back late as it's dark out there! Pienza is lovely - I recommend Del Falco and Latte di Luna restaurants, and Le Creten Enoteca wine bar. There is a small book/news store at one end of the town which recieves that days english newspapers, around 4:30pm each day.
All in all, a very pleasant stay, and we really liked Le Traverse. Having said that, it is expensive (we paid 1017 euros for 7 nights, and that was after the discount of one free night being knocked off) for what is in effect a high-end bed and breakfast. If I were to go to the area again, I would book a hotel or auberge in Pienza itself, or maybe in the town of Montelcchino which was close by too and had a lot more to choose from in the way of evening entertainments.