Although we fell in love with the photos of Guillaume's place, it was actually even better than we expected: very spacious; beautifully and practically laid-out, and designed with real flair and imagination. For families with small kids, it's ideal as the playroom (very graciously shared with visitors by Guillaume's children) is on the ground floor, within ear-shot of the kitchen. Our boys disappeared in there as soon as we arrived, leaving us to sink into the piles of cushions and enjoy the space.
Practically, everything was there that we needed (including complimentary milk, water and wine) and if we had any questions, Guillaume was extremely quick to respond. Although this is a family home, it felt really uncluttered and easy to live in - the kitchens and bathrooms fully cleared for use, for example (no half-used jars of mustard or tubes of toothpaste!). There's loads of great places to sit and read, the view through the huge windows in the main bedroom out over the rooftops of Bordeaux, was a particular favourite, as was the garden at night, hung about with fairy lights.
Bordeaux itself is a delight and this is a great base: not particularly central (a breeze if you rent bikes, I imagine) but very accessible, and a very nice neighbourhood. Being there in August was a little tortuous as so many of the great local shops were closed, but it was lovely and quiet. We headed out to Arcachon by train, which took an hour, and was a fun day at the sea.
All in all, I'd very much recommend Guillaume's place: stylish, comfortable with a helpful host in a great city.