We bought a Groupon for a Go-Today trip to Chile that involved two full days of winery tours starting from Santiago Chile. Instead of full days we got half day tour. When we advised Go-Today of the discrepancy they blew us off, begged for more time, claimed they had to investigate, and then stopped responding to email. They will totally rip you off and then ignore you. Even the tours they actually provided were not that great. Don't bother with Go-Today, their customer service is horrible, you're better off planning your trip on your own.
Update: well I guess a Google review got their attention, but their only response was to offer 10% off what I paid. They literally provided me a different trip than advertised, I flew over 5,000 miles to get there, and 10% is the amount they think will cover it. Terrible "customer service" and complete scam.