I've used Viator for years, but recently their services have gone into the TOILET. I booked airport transfers in Paris, Barcelona, and Vienna through them.
Paris - we couldn't find the driver and spent 40 minutes looking for him.
Barcelona - the driver showed up with the wrong name on the sign, which delayed our departure for an hour.
Vienna - the driver was waiting at the gate as promised. However, on the ride from the airport to our hotel, the driver actually fell asleep at a stoplight. It scared the living *** out of my wife and I because we thought he had suffered a heart attack or was a narcoleptic!!!
I will not use Viator services EVER AGAIN. It's just easier to get a d@mn cab!
Reason of review: Bad quality.
Monetary Loss: $600.