The rooms were very small, although adequate for our needs. While the Wifi was reliable for browsing, it wasn't reliable enough to maintain a VOIP connection for making phone calls from our computer. The bathroom and shower are quite cramped, although, as I said, adequate. The TV doesn't have any English channels, which they usually do in other European countries for those who don't speak French (my travelling companion did not).
The breakfast, at 13 EUR, is FAR overpriced for a continental breakfast, and you can make do with a <2 EUR pastry from next door very easily, unless a big sit-down breakfast is your thing. Even then, you might as well go to one of the many neighbourhood cafes. Needless to say, we never had the breakfast.
This hotel is close to several Metro stations on different lines; if you take just a <5min walk you get to Nation Metro station with several lines (including the 1 to Chatelet) and the RER. That's a 10 minute ride into the heart of Paris, or if you want you can use the smaller, closer Metro stations at Avron or Buzenval.
The neighbourhood is full of reasonably priced (for Paris) restaurants, including a Moroccan restaurant practically next door that does couscous and tagines for far lower than you'd get near Les Halles. There is a bakery next door with delicious French pastry's which you can grab for breakfast on the way out.
Wifi was available in our room. The beds are comfortable, and they provided the extra pillows we asked for. The bathroom was clean, the front desk service reasonably friendly. We had a courtyard-facing room, and it was very quiet.
On the whole, I can recommend this hotel for people who are just in Paris to sightsee for a short time, like an extended weekend. If you don't insist on staying in view of the Eiffel tower or having luxury accommodations, the price/value ratio is relatively good.