Very nice hotel, 10 minutes' walk from the old town, the coach station (for direct coaches to the TGV station and Marseille airport), and Aix main railway station. Staff were very friendly and the room was quiet and well equipped.
Only negative was the bathroom which could have been cleaner (I spotted black mould and items of litter on the floor behind the washbasin unit, albeit in a hard to reach place but did suggest the cleaning wasn't as thorough as it could have been), and there was quite a big step up to the shower which could be a problem for some.
The check in time of 4pm is also quite late, however as I arrived quite early I was allowed to leave my luggage at reception.
Overall, very nice stay and I will definitely consider staying here again.