I am going (with 3 others) to Paris for 5 days in March and am considering using a concierge service to help plan my days and see some places that are off the beaten path. Has anyone used a concierge service? Are they worth the money (60 euros/day)? I have traveled overseas before to Italy and Ireland but feel somewhat intimidated by Paris. I don't speak french (although I am studying it now). Any suggestions?