A nice quiet apartment in the Latin Quarter that is conveniently located between two metro lines (Line 7 & 10). It is pretty easy to walk to the major sights as well. Food, supermarket and other major amenities are all minutes away. The apartment was also very clean to boot!
Best of all, Greg is a welcoming and accommodating host who takes the time to recommend the local sights that might tailor to your interest. He was also gracious enough to let me stay till late afternoon due to an early evening departure.
All in all, I highly recommend you to crash at Greg's if you are in Paris. I know I will! :)