I never got a chance to take this tour... I booked this tour 2 weeks in advance through Viator. I was staying in Anchorage for 2 days after my cruise and thought it would be such a great way to see another part of Alaska. I kept getting emails from Viator with info like "your tour is coming up", "your cc has been charged", "here is your ticket" and the last one said that the provider/guide will call me before 12pm on the day of the tour with final details of the exact time of pick-up. On 6/11, the day of the excursion, I was checking my phone frequently to make sure I didn't miss the call, no one called. So, at 2:30pm I call the number that's provided in the email for the tour operator. A guy pick up the phone and I politely said that I was just checking on my reservation for today because I didn't get call from the provider as per Viator email. He said that it's his home phone and why would he know anything about a tour. He was a bit rude and very annoyed. He told me there is no way he can give me a tour today. I had told him several times that I had booked this tour in advance, not on the day of. He sounded a bit confused. This is my first time using Viator (i booked all of my excursions through the cruise line) but if you advertise your services online and then don't even bother checking if you have bookings... He repeated that there is no way he can do a tour that evening, so I asked for a refund. I was baffled by the complete lack of professionalism in his replies to me. He said, fine I will refund the money and when I asked for reassurance on how and when the refund will be issued, he literally laughed and said that he just has to press one button and just hug up. I don't know if it's a single incident like this, in my case, but it was still not a pleasant experience. I was really looking forward and excited to go on that tour and this unpleasant and unprofessional experience has definitely ruined my mood.
After this, I don't think I will ever use any sites like that for booking anything travel related.