We have just returned from a two week stay at Villa La Cascade and I couldn't recommend it too highly. The villa is spacious, comfortable and very well equipped. Threre are three seperate outside areas for eating and relaxing and a great pool.
The village of La Rayol has very nice shops an excellent restaurant and a weekly market and with one exception everyone we met was friendly and helpful and was very tolerant of our efforts at speaking french. A note of caution though, if you use the boulangerie down the hill near the supermarket make sure you know exactly want you want before you go in as indecision is not tolerated nor are children who touch the glass.
Whilst we weren't there at the height of the season we still had very good weather with temperatures getting up into the low thirties, I therefore think that an investment in air con if only for the bedrooms would reap dividends.