We stayed for a week in Dec11 and it proved to be a great choice. It's budget accommodation without a doubt (so not suitable for a romantic weekend) but the price is unbeatable and it's close to Metro, RER and Train a good boulangerie (bakery) for your breakfast and several other shops to make for a great stay but nothing luxurious about it.
I think it used to be student residence and the apartments has a small kitchen and a fridge, a dining table and a large desk with TV. The kitchen is not adequate to prepare a proper meal, but very useful for making breakfast or to reheat food you bought or sit down to your rottiserie chicken and potatoes (which you can buy at any butchers). The bathroom is small but thanks to a clever design of a door that closes on 90 and 180 degree angle it can be made bigger by taking up the entrance area and gives you a separate room to get dressed etc.
There is also a pool, but I wouldn't count on that, as it didn't work while we were there and I got the impression that it has been a while since it did.
Free wifi is included in the price, and you need to get your code from reception. The staff does not speak very good English but if you make an effort they will try to help you with anything you need. Also, the room was not cleaned at all during our stay (Mon-Fri) but we didn't mind as we don't like people to go into our room when we are not there and it's not like we change our sheets at home every night! In general the apartment and the building looked a bit tired but was very clean.
Please note this is the same hotel as "Adagio Leonard de Vinci" which you'll find tour operators selling. Adagio have recently bought the chain.
We go to Paris often and for us it was great for the amenities and the price.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC