This October four of us have combined the Autumn Along the Rhine which ends in Munich with Romantic Germany that begins in Frankfurt. We were debating about how to get from one city to another. The train was out of the question because we didn't want to handle our luggage. We checked airfares. We checked a couple of car services. I asked Tauck what car service they use in Munich and they gave me the contact info for SIXT ride. SIXT ride responded immediately with a quote that was less expensive than 4 airfares. They don't like to take credit card info over the internet so they asked when a good time would be to call me. And they did. I was really impressed with their service level! They were more responsive than my doctor's office.