I need to get from CDG to the apartment my SO has rented in the 11th arr and he seems to think that after the long flight I shouldn't bother with the RER and then however else I transit to where we are staying. I found parishuttle.com and it looks like pretty much what I was looking for - cheaper than a taxi but still door-to-door. I searched this board and found references to it, but I would like to hear from folks who were actual satisfied customers. I would be using it Monday morning and then if it works out well we would probably want to book it for the two of us returning early-ish a week from Sunday.