There's no doubt that Bordeaux is a very pleasant and liveable city. We arrived late in the evening (11 p.m.) and our taxi driver proudly pointed out all the monumental highlights: the bridge across the Garonne, the Place de la Bourse, the old city gates and the water mirror to name but a few. They are all flooded in light after it gets dark: a very fine sight.
The next morning we did a self-guided tour of the main city area, which is not very large. The streets are well-geared to pedestrians, and everything looks very neat and well-preserved. The buildings are very uniform in style and colour. We were already completely in awe of the monumental fountain with its statues of horses at the Place de Quinconces.
As other reviewers have remarked, there are no really outstanding buildings that warrant a separate visit. The most interesting structure may be the Cathedral. This is part of the French Routes to Santiago de Compostela also, and I think that it fits that label better because of its age.
There are lots of smaller things to see and do however in the streets of Bordeaux: the pastry shops, the plentiful terraces of its bars and restaurants, the well-stocked shops (I bought some smelly cheese to take home with me!), the Jardin Public. Combined with especially sunny and warm weather for early October, we had a good time in Bordeaux.