My experience at the Hotel en Ville was never disappointing. I traveled solo and had no problems with the staff or with my room, which consisted of a comfortable queen bed and a (not-so private) single bathroom with shower.
There are not many frills in the room -- it has a modern feel to the decor -- but it was charming just the same. The room was very open (high ceilings and two windows facing the street which, when shuttered completely, blocked out all noise from the street below) and was spacious enough for two, although the bathroom wouldn't afford much privacy if more than one person were staying in the room. I have read in other reviews that other rooms had "saloon" style doors to the toilet room, but my bathroom only had a partial wall (no door). Perhaps the room is intended for only one person? In any case, this did not damper my experience at the Hotel en Ville.
I found the staff very personable and helpful, and the location, although not smack dab in the middle of the action, was not out of the way. It was only a short walk to the center of old town. The breakfast available downstairs is delicious -- I hope they still offer it (after all, I stayed there a year ago).
I would recommend this hotel for a short weekend in Aix, as I had a lovely time and had no complaints (I can see the bathroom being an issue for some, but for a solo traveler it really wasn't a problem!). Ideal for a small party or a solo traveler, especially if you are looking for a pleasant, quiet, and unintrusive atmosphere.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.