I did the Queenstown Otago Rail Trail and loved it. Was such a great group of people, the accommodations were well chosen (there isn't much choice is some of the smaller places!), the meals were splendiferous and the bikes were good quality. They run a good trip.
I just completed the Queenstown West Coast Ride on March 13th and the whole experience far exceeded my expectations. This was the second trip I have done with Adventure South and I cannot speak more highly of the organisation and the great guides/tour leaders. Dave Monks & Brett Strachan were great and were instrumental in bonding the group from the get go - Great trip and fantastic experience!!
They kinda helped me travel.. I don't know why they exist honestly. Webjet is a thing you know.