So, I would rate this CDG airport as average because the airport seems deserted even during peak hours/season. It is a very big airport and you have to help yourself with the signboards from place to place. When I landed in CDG, it was pretty simple upto the point of baggage collection. After that, the exit passage had no counters or information helpdesk. I even caught hold of some official and he didn’t know to speak French.
There was no immigration or any such check for me. I struggled to find the Bus Stop. People don’t speak English and they won’t easily even if they knew.
OK. Experience! Try to download Airport Terminal layout and study it properly to have some information coz no sense in depending on people help here. They are not happy to help like some other countries.