We spent 5 nights in Reims and found this apartment met all of our needs. It is well-located, just 5 minutes walking from the Cathedral (you can see it from the apartment), 10 minutes to the Cryptoportique area, 15 minutes to the Gare SNCF, and 20-25 minutes from the big champagne houses. So no car necessary to enjoy Reims. Lots of restaurant options nearby. Le 17 was quite good and less than 10 minutes away.
The apartment is as shown -- the bedroom / sitting room is large enough and airy, the kitchen is roomy and well-equipped, the WC is separate from the shower, and there is a desk area if you have work to do or want a comfortable place to read on a laptop.
You can arrive in Reims at either the Champagne-Ardenne station or in Centre Reims. Cedric was kind enough to pick us up, which saved us time and dragging luggage.
If you want to explore the region, it is easy to rent a car in Reims and drive to Epernay (super cute), to smaller champagne producers / villages, or out to Verdun to visit the WWI sites. You can park the car for free just a few minutes away from the apartment, or park closer and pay for certain hours but it is free overnight. Either way, it was easy and convenient as we had a car for 2 of the days we visited.
Overall, we were very impressed with the Champagne region as a destination and found the apartment to be a very good and convenient base for our adventures. We would return and stay at the apartment again.
Thanks again Cedric!