This is a good location to get to the RER and the local metro trains within 2 min walking distances. Be warned though, if you are taller than 5", you must remember to duck ANYWHERE around the bed, or you will hit your head. You also need to be fit, going up 7 flights of stairs in short succession will wind you so if you don't want to be sweaty upon arrival at your floor, consider taking a leisurely 5 minutes to go up the stairwell. You also definitely don't want to be making this a same day multi-trip event from home base. Ideally, you leave in the morning, and whenever you come back you don't leave until the next day. Toilet is located in the common hallway, but right next to your room. So still mildly convenient. Bring your own toilet paper provided from the room, as there is nothing but hand soap and water provided in the toilet room.