I stayed with my family (wife and baby) for only one night. Reaching the apartment from the train station was very easy (10min by the C7 bus).
Hubert gave us all the information and was very responsive all the time.
The studio was clean and corresponds to the description. I would add that the ceiling in the mezzanine is not high, so, if you are a bit claustrophobic I wouldn't recommend it.
In general I think it is a good value-to-price option and we had a good stay.