I have stayed there a couple of times. Very good value for money - rooms (then) were about Fr4-500 as against Fr800ish for 3* hotels. Very comfortable, excellent breakfasts - but go out for lunch and dinner!! Located a short walk from Gare St Lazaire on Bd Hausmann (phonetic spelling). Underground carpark next door for Fr160 per day if you feel brave enough to drive around Paris. Known as Cercle d'Armee. Book by phone, you will have to produce an ID card but, unlike the USA, no need for 'TDY Orders'. Had the phone number but not with me.