Eric's place was great! A very short walk (<5min) to Goncourt, which takes you to Chatelet in 10+mins (that's where you can get to the Notre Dame). There are stations for some other lines nearby too (all within 10mins by foot), which makes travelling to any attraction in Paris very convenient.
The apartment was very spacious, comfortable for two. I really liked the experience of living in a loft. Loved the exposed timber supports!
Everything you could need for a stay - hair dryer, washing machine, coffee machine, cups, pots, utensils etc. - was provided. The only bad point I could think of is that there isn't a lift in the building, so you might have to bring your luggage up. For us, that wasn't a problem, as Eric's friend Aziz helped to bring our luggage up during check-in.