Whether Marco's place will fit your needs depends a lot on what you're looking for.
Marco is a great host, he is very responsive and helpful. The apartment itself is relatively spacious (for Paris) and has a nice layout that lets you use rooms independently. It could be better equipped (for example the stovetop isn't great, and the dishes are a bit of a mish mash) but it certainly functional. The apartment has a small washing machine which we used and were thankful for. Internet is very fast.
The major drawback is the noise. The apartment is located in one of the major party street in Paris. Especially on Fridays and Saturdays, noise (mostly conversations, mostly coffeeshop level from inside) can be heard until 4am or later. If you're anything but a heavy sleeper, this will be a serious consideration for you.
On the flip side, the location is extremely convenient: tons of restaurants, shops, bars, etc. It's also right next to Bastille, a subway hub. A gem if you stay up late.