Arcadia NZ at the University of Canterbury was an absolutely amazing experience! The program staff was extremely knowledgeable about New Zealand, academics, Kiwi culture, and were always available if you needed help or advice.
At UC, your schedule as a study abroad student is pretty flexible (unless restricted by your home institution's academic requirements), and even a medium-hard course load still allows ample amounts of time to explore the country.
Christchurch is just shy of two hours away from the Alps, with loads of hiking, backpacking, and bouldering. You have direct access to the West Coast, and it also boasts some of the best surfing beaches! Weekend excursions are always feasible and while uni may seem saturated with study abroad students, this also allows you to find people to travel the country with (aside from those in your program).