If I was reviewing this hotel purely on its architecture, the quality of the rooms, and the great night's sleep I got on one of its wonderful comfortable HUGE beds, I'd not hestitate in giving it 5 stars. But the high prices charged and the lack of included extras that I've come to expect after staying in hotels in the USA mean that the CDG Hilton just can't score that highly in my book.
The good stuff: the building is awesome, in a shiny giant modern kinda way. Considering it's practically on the runway at CDG, the hotel is incredibly quiet. The beds are great. The rooms were very clean. I stayed twice, and the first rate was a very fair 109 euros, which included the best buffet breakfast I've ever had. The gourmet restaurant's prices are extortionate, but the veal main is divine and the service is attentive.
The bad stuff: those little extras that you might expect from a business hotel are nonexistent. Wireless internet access should be free as standard in hotels these days - at the Hilton CDG it's 27 euro for a day's access, which is utterly ridiculous. As I mentioned, I stayed twice - and the second night cost me over 200 euro - without that wonderful breakfast as an inclusion. The buffet dinner was terrible, terrible, terrible. The bar's prices are insane (12 euro for a nonalchoholic fruit cocktail?? The same for a very tiny shot of the worst Scotch imaginable?). No newspaper at your door in the morning. Staff who burst into your room while you're in the bathroom! No guest laundry, but then we travelled all over Europe without stumbling upon a guest laundry anywhere, so I guess that's just a continental peculiarity. You could have your socks and underwear drycleaned for 4 euro a piece. Ha. All of this cast a bit of a pall over what could easily have been a great stay at a really nice hotel.
If you get a good deal and don't mind being ripped off for absolutely everything you might dream of eating or drinking or doing in the hotel, then go for it. I guess the Hilton CDG is built for corporate expense accounts.