I was flying into Chicago solo and didn't want to navigate the train with briefcase/luggage/purse/bags so I found Viator online. I had questions so I called first. The person who answered (Shonda?) was great. Even though the website is easy to navigate, she booked me while on the phone, and sent confirmation and voucher right out. The directions as to where to find the stops were easy to read and understand and I boarded the van within 12 minutes after arrival and collecting checked bags. VERY IMPRESSIVE. I was also impressed with the driver who was so friendly and courteous. I will definitely use Viator again.