Stayed here with my family for 3 days. Overall, the hotel was average; it was safe and clean but small and a bit cramped, though you can't really expect more from a European hotel in general, especially in Paris where things have to be small to fit. We were generally only in the room for sleeping and for that reason it wasn't any problem. There wasn't a lift, and the windy and worn stairs made it difficult to carry all our bags up after being exhausted from our trip. The staff was generally nice and accomadable. A lot of the staff didn't speak much English beyond the basics; I was able to translate for my family but for those that don't speak French, it could be a possible problem.
The location was fantastic, it was in the heart of the Marais, a 3 minute walk to the Hotel de Ville metro station, the Hotel de Ville area, le Centre Pompidou, and very close to the Notre Dame and la Seine. It was certainly a fun area to be in, and there were shops and restaurants all around. It did get loud at night, especially with the gay bar right across the street, but as the Marais area can be known for its nightlife it was expected. It was a pretty safe area and a great area to explore the places around.
Though it was a tad overpriced for what you get, it provides you with the basics for sleeping and showering, all you really need when you want to spend the rest of your time exploring the city. Overall, it was definitely worth it for the perfect location.

I have stayed at the Acacias on every trip to Paris over the past many years. The staff is uniformly hospitable. Some of the rooms are smaller than others, but the front desk is happy to accommodate a request for a different room. They also do their best to reserve a room that meets your requirements (such as overlooking the street; or the inside court; or plenty of light), provided you make your reservation well enough in advance.

We have never eaten breakfast at the hotel's modest dining room -- there is an abundance of sidewalk cafes within a block of the hotel. The greatest downside is the lack of airconditioning in summer (although a fan is provided, and most of the rooms are well ventilated) and an elevator! But space permitting, the front desk will allow you to temporarily store your bags near the dining area. The hotel is clean and well-maintained, and it is easy to overlook some of the cosmetic drawbacks in light of the superb location at this price ... walking distance to major attractions and shopping, and a very convenient access to the Metro.

If you can manage, avoid this place. I read previous bad reviews, but had no choice but to stay there since I booked last minute. The bed is extremely uncomfortable, the room/hotel smell of cigarette smoke, the staff barely speak English, despite the advertised free wifi, it only works in the lobby, and the lobby "closes" at midnight.
But WORST OF ALL: my debit card and iPhone headphones disappeared during my stay there. Someone used my debit card to charge US$2000 at a men's clothing store. :(

Fantastic location - 100M to Metro and parking. Super friendly staff. Rooms were large by Paris standard. We stayed in a triple. The shower was very small and the bedding was old. The rooms were dated, but at least the sheets were clean. We had a room on the street and the neighbor hood has several bars and restaurants that did not disturb us. Good value for the money!