Horrible company - I used them many times and each time there was an issue with the tours in Philadelphia they canceled all the tours that I had with them advising me less then a day when I explained to them that I didn't book and can't book with any other company they didn't care so I was stuck 3 days in Philadelphia with 2 kids and wasted over $1000 for hotel fees with nothing to do and 2 kids driving me crazy they didn't care. In kauai I booked a few tours with them the tour operator contacted me and advised me that they are cancelling the tour since they are not working with TripAdvisor anymore since they double booking tours and making them look bad. Last April we traveled to Kauai and I booked a few tours with TripAdvisor for my own personal reasons I have cancelled the tours with them and was sure that all of the tours were cancelled however one of the tour wasn't canceled and I was charged the full amount of the tour I have contact Tripadvisor and told them what happened told them that I have been a customer for years and still booking tours with them I asked to speak to a supervisor since I didn't see any resolution they told me that there is no supervisor and that someone will call me within 4-7 business days which no one did I contact my bank and disputed the charge they came back to me and told me that they can't reverse the charge since I didn't cancel my trip 24 hours prior to the scheduled day I called Viator again and explained my situation and again they refused to return my money. This is the worst company that I have ever did business with I have canceled all my future tours with them and will not do business with them again.