As all other short and long-term tenants have stated, the location of Nicolas' apartment cannot be beat. It has great, funky charm, which for me was appreciated. I really enjoyed drinking wine and listening to the expansive vinyl collection. The elevator is quite small, so if you have large luggage you will need to do it in two or three trips, but it's not the end of the world.
I happened to be in Paris during a heat wave, so unfortunately I was very hot at night, and since I had to leave the windows open there were mosquitoes. It was a no-win situation for me, and I could not find a fan in any stores nearby. Unfortunately again, there was heavy construction across the Seine in the morning, but that's not anything Nicolas can control.
I'd definitely stay there again!