We had a great stay at Matt's place.
The apartment is quite large by Paris standards and we've had enough room for 2 adults and 2 grown children . The ceilings are high and apartment has large windows with makes the rooms bright and airy with exception of the 2nd bedroom. It only has a 'skylight' in the wall letting the light in from master bedroom . The 2nd bedroom is quite small and really does not have any extra space .
The kitchen has all the necessary utensils and appliances to make breakfast or dinner.
Having washing machine was a great plus (it would be helpful if we could find the instructions...)
We never met Mat but got all the instructions and answers to our questions in timely manner. Matt was very nice letting us to check in earlier and even allowed us to keep our bags in the apartment on a checkout day longer even though he was expecting new guests.
The place is well situated close to a couple of Metro stations . It's about 15 min walk to Les Halles and 30 min walk to Notre Dame .
The only real challenge we had is to navigate a single bathroom between 4 people in the morning....
Just to note , as with many Paris apartments this is a walk-up and so one has to be prepared to lug their luggage up .
I would definitely recommend this apartment and would consider it again if I am in Paris again