Frederick was waiting for us when we arrived in Paris. The apartment is just a 5 minutes walk from Les Halles (which is one of the startion for the RER B from CDG). He was able to give us some recommendation around the area and there are varied options of stations (metro and bus) to choose from. The aprartment was clean and have enough room for 5 of us. Thank you Frederick for making our Paris vacation a memorable one.