My fiancee and I traveled to Paris for a quick Valentine's Day weekend together, and could not have been happier with our hotel choice. Just off bustling Rue Cler, the location was a huge selling point for us. Hotel du Champ de Mars is positioned right in between the Eiffel Tower and Les Invalides, and is less than a 10 minute walk to each. But, our favorite part about the location was that Rue Cler was right outside the front door. An extremely charming pedestrian street with open-air markets, restaurants, and shops - there's always something happening. We were a little unsure about finding a place to eat late on Saturday night (11pm), but there were still a number of options right around the corner, and we still felt safe walking around the area after 2am. It had a great neighborhood feel.
The room we stayed in (#2) was small, but very clean and well kept. We even had a little courtyard entry to the room, which made it quiet and private, as if we were staying in our own separate bungalow. We didn't see a single other person while we were there that did not work at the hotel. Definitely a huge bonus for a quaint and romantic weekend! The bed was comfortable, the bath/shower had plenty of hot water and pressure, and there was even a television in the top corner of the room with CNN in english.
The owners of the hotel were extremely nice, helpful, and unassuming. They have the front desk staffed 24 hrs/day due to the fact that when you leave the hotel you need to leave your room key with them. This turned out to be sort of an unexpected surprise for me, as you didn't have to worry about losing your key, and there was always someone available to help with anything you need. Apart from the owners, there were two other gentlemen who helped cover the night shift at the desk, and all spoke english pretty well. At the front desk, were able to buy museum passes, print Eiffel Tower tickets, as well as arrange an airport shuttle. There was a small miscommunication issue with the shuttle due to the fact that is was going between two of the desk attendants and we weren't completely sure they had it scheduled for pick-up, but it ended up working out in the end.
Highly recommend Hotel du Champ de Mars - amazing value, charming neighborhood feel, and adorable by design.