Did a 5 night stay in Brooke and Pierre's place and the positive reviews are accurate and my personal expectations were met.
Having never been to Paris before, I did not have any reference in regards to value, location, etc. At first, I thought the place was a bit noisier than I expected, as there is some foot traffic you hear, a schoolyard across the street with kids playing at recess, and an upstairs neighbor you can hear walk around from time to time. That said, after spending a couple days in Paris and noticing how busy and loud the city is in general, the place was very quiet relatively speaking. And when we needed quiet (i.e. sleeping at night) the provided fan was more than enough to keep things very quiet.
The location is probably the best part of their place. Le Marias is simply the best neighborhood in Paris. Tons of everything, shopping, cafe, coffee, clothing, bars, nightlife all were walking distance. Loved the walk to D'Orsay and the Louvre.
The place is large enough that it felt like home, and not a cramped hotel room. On several occasions we had a pre or post dinner drink at our place and that gave us reprieve and comfort.
Overall, staying at Brooke and Pierre's place will only be additive to your trip in Paris!