My husband and I stayed at the Architect Flat during our last minute getaway to Paris, and we just loved it.
It was a beautiful flat accessed from a cute courtyard. A cozy little space, and yet very well designed to seem airy and spacious. The bed was super comfy--very important.
The location was a gem. We didn't know a whole lot about Le Marais, but spent 5 days exploring the area during our trip, and the location of the flat couldn't be better. It was on a quiet street and surrounded by cute shops and cafés. Right around the block from the newly reopened Picasso Museum. All of the major sites are very accessible from there (most walkable) and multiple metro stops are very close.
Corentin was very easy to work with and accommodating--especially given how last minute we were with booking. We would absolutely stay here again and would highly recommend it in particular for couples traveling together.