We stayed with our 2 children (6 and 3) for a week in August. The place worked really well for our requirements.
The off street parking is great and we fit a BMW 5-Series estate in the shared ground floor garage space (anything bigger you'd probably struggle). The location is pretty central and trams A and C are 2 minutes away, so we didn't need the car for exploring Bordeaux, and only used it for a few trips out of town.
The apartment is on the UK 2nd floor (US 3rd floor) accessed by climbing a communal central spiral staircase.
The layout worked really well for us. Of the 3 bedrooms the main one (full en-suite) is off the living area the other 2 bedrooms (where we stuck the kids) are at the end of the flat with a separate toilet and family bathroom between them. Which meant we could stay up late without disturbing them. The flat has no road facing windows, so is also pretty quite.
It was very hot during our stay (mid thirties) and there is no air con, but fans are in each of the bedrooms and the building is constructed of thick stone, so it didn't get unbearably hot inside.
Also really handy with the kids is the fact the kitchen is well stocked with (Ikea) pots, pans and cutlery. The washer and dryer are in a separate utility cupboard.
On arrival we were met by Clement, who was very helpful and flexible about our time of arrival and departure. Both Clement and Romain provided information of things to do in Bordeaux. Romain's communication throughout the whole process was excellent.
All 4 of us really enjoyed Bordeaux and staying at Romain's place.