This has become my go-to hotel at the CDG airport.
#1 - excellent location with tons of connection to all different modes of transport inside Paris or away from there. SNCF trains, RER, airport tram. Take a simple tram across the street and you are at the right location in the airport. Great for a night before or after your flight before you move on.
#2 - Pet friendly, no fees. In addition, plenty of quiet grassy area for dog toileting.
#3 - Very helpful and friendly staff. Once I booked the wrong night and they adjusted and gave me a room anyway. They are very flexible and understanding about the needs of people in transit. No fuss, no waits, no negativity. They just help you out.
#4 - good breakfast. fast pizzas at odd hours. Reasonable restaurant although less options if you are vegetarian. The hotels next door have more restaurant options too if you want.
#5 - good spaces to hang out and games and things to pass the time. Room was spacious enough, clean, relatively new. Plenty of space to shower, get ready, repack.
#6 - Usually cheaper than the hotels around it.
#7 - good wifi.
#8 - quiet.
Just stay here. :)