Originally Posted by JOUY31

I second the recommendation to get a hotel closer to the terminals. Getting to the Mercure can take some time, although it is true that the hotels around the Mercure are cheaper. Hotels close to the terminals include the Ibis, the Novotel, the Hilton and of course the Sheraton.

With respect to AF coaches, it really depends on the time of the day. At off-peak times, I would personally take the AF coach (or the RoissyBus) as it is convenient and hassle free. At peak times, the RER suburban train would be a far better option.