We were there October 16th - 23rd. Weather was warm during the day if it was sunny (T-shirt and shorts compatible for people from the UK, though locals were wearing jumpers, long trousers, boots, body warmers and scarves!) Quite cold over night, so need to take layers of clothing. Need to watch weather forecasts for rain etc and go places where its not going to rain.
The property was really nicely finished - good shower rooms, well decorated, clean, comfortable, plenty of hot water, adequate an beautifully clean kitchen. Cable TV was useful - could get BBC News 24 as one of the channels. Would have been improved with an extractor fan in the shower room to get rid of the steamy air - though that wouldnt have mattered in the summer as you could have just left the window open!
There were lovely panoramic views over the countryside.
The guide-book to local places put together by the owner of the property was very useful and well researched.
Note the country roads are a bit slow in Tuscany in general, though google maps seems to get the expected journey times about right.
The restaurants in the local town/village of Casole d'Elsa were good.