Hotel Neptune ensures checkin at late hours so it worked out good for me since I arrived at 1am. The hotel is very small and does not have an elevator. It was a struggle to get my suitcase up to the first floor. The person at reception was kind enough to help me with the suitcase at both checkin and check out. The room is extremely small, however I booked it with the intention of having being able to take a shower and get afew hours sleep before I started my Euro Tour. The room was very clean. There was no AC however, sleeping with the window open worked as it was cool enough. Keep in mind that this hotel is relatively cheap, therefore the amenities that comes with it are good for the price. I would recommend this hotel if you're commuting in Paris.