This place is great. It's in a very trendy part of the Montmartre and very close to shops and public transportation. The place is small and simple, but it has all the amenities you could need, as well as a very cute patio (there was also an adorable cat that sat on the patio wall and watched us every day!).
Guillaume was a great host; he was attentive and responsive to every communication. At one point, our travel timeline abruptly changed, and was a able to get us an early check in with only a few hours notice.
All in all, if you're looking for a simple, cute place to stay in one of the cooler, less touristy parts of Paris, I highly recommend this place!