There were a number a great points at my visit:
1. Wissam was always responsive and helpful even though I never met him in person
2. the location of the apartment was fantastic, I loved that the RER and Metro were within walking distance.
3. lots of cafes and grocery stores nearby
4. the apartment was well furnished and we had almost everything we needed (a hairdryer would have been handy)
5. the concierge didn't speak a word of English but she could understand what we were trying to say and was real helpful
6. it was easy to hail a cab from Pompidou George Centre when you needed one
7. the apartment was tiny as accurately described, so it was ok for 2 but it will be cramped for more people
8. the apartment was easy to find for someone new to Paris
9. the beds (including the sofa bed) were very comfortable