I used the SFOAirporter for the RudiFest and was disappointed. We waited well over 30 minutes for a bus. They claimed they were short staffed. I was on the full size bus and I think we stopped 8 or more times before we got to the Hilton. I don't recall where the W fell into the route. I have used the Super Shuttle and was disappointed in the past...that is why I used the Airporter. But on an expense account, I'd grab a cab. The dollar savings is not enough to justift the extra time, IMHO.