I have stayed at the Hotel Residence Monge and it was well located. They have since changed names and ownere.

http://www.hotel-actev.com/

Thanks all your replys have been very helpfull, i think ill stick with either 2 of them hotels, it does not have 2 be in september as her birthday is in august, so i could send them later august or even start of october

I was in Paris recently and stayed in two hotels at very different neighbourhood. The first is Hotel Lyon Mulhouse at Bastille (at a very lively area with plenty of eateries and night life) and the second the Hotel Porte Doree (a bit far from the city centre at a very quiet and pleasant area with basic amenities around). Both cost just under 100E per night (during my stay) for a double room and are clean and comfortable. You can read more about them in my Blog below but I am sure you can find many more hotels for under 100E if you search around. As long as they are near to a Metro station, all the Paris sights are just a train ride away.

Ronald
http://paris-france-holiday.blogspot.com/