Can anyone recommend a good car service when we arrive in Paris CDG to take us to our hotel?

Why do you want a car service? Why don't you just go out to the front and get in a taxi? It would be a lot easier. You are going to pay a lot for a private car service, if you mean one where you are the only passengers and you have an appointment for them. There are multi-passenger group vans that are cheaper (e.g., Bee Shuttle), but if it's only two of you, it won't be much cheaper than taking a taxi. How much are you willing to pay for a private car service, maybe someone knows one.

Did you know there are at least six ways of getting between CDG and Paris? Details here: tinyurl.com/mpjhn

An exact ditto to what Christina said.

We are flying into Orly at 10:30pm and need to get to the 7e. Do you recommend a taxi or can we take the easyjet shuttle?

Thank you for the response. There are 4 of us and we really did not want to take the metro. Wasn't sure if a taxi can accomodate us or I needed to reserve a service to pick us up.

Zemom - Here is the guide to Orly transfers: tinyurl.com/yh97u4

For the VIIè, the Air France bus is often optimal, as it terminates at Invalides.

But there is no "one-size-fits-all" answer, because different people have different criteria. Many find that a combined OrlyVal/RER/Métro ticket for 9,10€ suits them best - but this route isn't easy for those lugging a lot of luggage. A single roller and over-the-shoulder carry-on are easy, though.

We often arrive with 4 people, walk to the taxi queue and get in an adequately sized cab. The entire fare will be approximately 50E. When you are ready to return to CDG ask your hotel to order a cab for 4 people. VERY EASY.
We have taken the RER one time with our daughter, and it is not for us. A shuttle will cost more than a cab for your group.
From Orly, for the other poster, a cab is also easy.