We found the hotel very clean, and all the staff were helpful and polite. The two rooms were small, it is true, but fine. There was one small open wardrobe in each room, but no drawers for your...drawers, so to speak. There was a flat-screen TV with iPod connection etc. One of our rooms had a shower over bath, the other just a shower unit. The bathroom had a hairdryer and soap/shampoo/shower gel dispensers.
The air-conditioning worked very well. Breakfast was basic but adequate. Bread, cheese, ham, pain-au-chocolat, croissants, yoghurts, jam/honey, cereals and a limited selection of fresh fruit were available. There was filter coffee, teabags+kettle as well as fruit juices (even an orange-squeezing machine!). The breakfast timing was excellent: 6-10; 6-11 at weekends.
The hotel provides tea and coffee in reception for most of the day and evening, which was a nice touch. There seemed to be some sort of play area for young children too. The free wi-fi was a bit hit-and-miss.
The area is just a shopping+business centre in a small suburb. We always felt perfectly safe, even arriving back at 11pm or so. Note that the RER station is in Zone 3, so the standard Paris T+ tickets won't work. We opted for Zone 1-3 mobilis tickets most days, as these give unlimited travel within the bits of Paris we wanted to see.