Located just around the Montparnasse cemetery corner, the hotel is currently under fully refurbishing. The problem is that they continue to offer rooms nothwistanding the fact that noise, dust and a sort of chemical smell are present in every part of the hotel...
The ownership told me that by the end of 2012/early 2013 they will finish the works and that the hotel will be fitted with a lift (today there is not) and other amenities; but unfortunately I used to to stay there at the beginning of October 2012...and the room was very "sad" and uncomfortable.
Based on the above my rate is definitely poor.

My boyfriend and I stayed at Hotel Mistral in April at the start of our five week backpacking trip through Europe. The hotel was easy to find from Gare de Montparnasse and upon arrival although our room wasn't quite ready because we were early they were more than happy to store our bags and get the room ready within half an hour.

The location has great access to the catacombs and the train station that takes you to Versailles (if visiting Paris do not miss a trip out to the chateau). There are some great restaurants just around the corner which are lively and fun and not as busy or expensive as the restaurantes in the touristy areas. A great way to experience the Parisian culture.

Notre Dame and the Louvre are walkable (we walked everywhere and it was never an issue) but for quick access the metro is also close to get to all of the main sites. It is also very easy to get to the main train station if you are travelling on from Paris to another city.

The hotel has complimentary wifi, a warm and cozy lobby and an eating nook that is quiet and comfortable. They also have a great quart yard area just outside the eating nook.

The room is small and simple but serves all the purposes of a backpacker and since we basically just needed a place to sleep it was perfect. We were even upgraded to a room with a private bathroom instead of the one we had booked with a shared bathroom. There is no lift just stairs but it didn't bother us in the least. The hotel is well marked from the street and we would definitely recommend staying here. The price is great in comparison to what is offered at other hotels and because there is so much to see and do in Paris it is good for a short or longer stay.

My girlfriend and I spent 3 nights in Paris in July. We were happy with the service of the staff at the hotel and the cleanliness of the room. The hotel is in the Montparnasse district of Paris, right near the Gaite Train Station so the metro is only a few blocks away. It was only a few stops from the key sites of Paria such as the Eiffel Tower and the Louvre.
Overall our stay was good. The rooms were a decent size for a touristy stay (a place to sleep and leave your belongings securely) We had an issue with the paper thin walls. We could hear every bodily movement coming from the neighbors bathroom who was clearly in a fair bit of distress. Understand the eating habits of the hotel clientel is not the hotels issue, but the wall thickness is.

Also, the hotel provides a baggage service whereby it can store your bags for you if you arrive early, or are departing the city well after you check out. This was appreciated, but it is merely a room around the corner from the reception. We were able to walk in at the end of the day and grab our bags without the man at the desk seeing us. It would have been easy to grab the laptop bag next to mine if I had wanted too.

Worth the money, but won't be staying there again.

The hotel is clean and everyone is very kind. The only issue is the lack of a lift (they are workig to install one in the near future) but the price was very competitive. I think this hotel is a good compromise for having a lovely hotel located in a quiet location, with silent nights and in the centre of Paris.