The first time to le marais, people call this is a great location, indeed it is, shops and restaurants around, the only problem is it is a 6 mins walk to metro and a little noisy in the weekend mid night. Though the window is pretty good on noise reduction, it is still probably better to get a pair of earplugs. The bed is slightly short if you mesure higher than 185cm.
The area is à la fois très touristiques et parisiens.