We spent 4 nights here from 13 December and would gladly return given the chance.
Its in a great location within Montparnasse, right next to a subway station. Other subway lines are a few minutes walk away, as are 2 RER stations(10 minutes or so away ) and it is in close proximity to shops, restaurants, cafes and a bizarrely large amount of cinemas.
Loved the interior and warm welcoming reception lounge. Getting to the rooms is fun in itself as its either up a tiny tiny lift or up a tight, squeeky wooden staircase - some may find that problematic, but I thought it added to the authentic, homestyle feel.
Room: did the job and is a decent size, although the shower cubicle is pretty cramped, it is hard to move without inadvertently moving the tap. Quirkiness continues in the decor and instead of a lounge style chair we had an old wooden school chair and school table, as well as a jotter containing hand written guest information.
The double glazing is exceptional at cutting out the exterior noise (it is on a fairly busy main road so this is needed) however it can get a little stuffy, even in the cold month that we went. Also the bed seemed to get exceptionally hot at times for some reason.
Staff were friendly and welcoming, and they `will store bags for you without issue. Overall it was clean, comfortable enough and in a superb location.