Five of us (we are in our mid-20's) stayed in Cristina's apartment and we had an absolutely wonderful time. The apartment was clean, newly updated, and very comfortable. It had three double beds and two bathrooms, which was perfect for a bigger group. The apartment is on the top floor of the building so there are many stairs to climb. But, this was not something we minded at all and being up higher was better in our opinions because you are off the street and it is quieter.
We ended up taking taxis/Uber to and from the train station, which was about a 15 minute drive. But, the location of the apartment is perfect as it is right in the middle of town and all sights and restaurants/food/shopping are walkable. Check in and check out was very easy and pleasant with Cristina's friend, Frederique. I absolutely recommend this apartment to anyone looking to stay in Bordeaux with a larger group.