Just done 2 trips that have been booked… Just done 2 trips that have been booked through Viator and are currently sitting in airport waiting to go on next trip which we have booked through them also , We have paid top dollar for the convince of using them as we are short on time and didn’t have the time to shop around with the local tour companies , we wanted everything booked in advance 1 st trip we ended up paying nearly double what we would have paid if we paid directly to the tour company on arrival in el chalten 2nd trip again paid over double what we should have paid if we booked locally, what makes it even worse is we were put on the cheapest tour in town - a comfortable 4x4 trip ended up being 7 people with baggage crammed into a car with not all the windows operating, and arriving at accommodation it was a really low standard, toilet and shower waste dumped directly into swamp below , however the guides and staff were really good- the money we paid should have gone to them We are waiting to go to salt flats in Bolivia unsure of what to expect next , I will be contacting Viator soon asking for an explanation I have traveled extensively over the years and normally without a time constraint, thought it was a good idea to pre book everything but definitely the wrong decision AVOID using Viator - put your money into the local community rather than the pocket of someone else