I haven't cycled in NZ, but I travelled around it for 3 months after university. It is one of the most beautiful countries I've ever been. It is extremely diverse in scenery, which changes every 30-50 miles. It has volcanos, emerald seas, hot springs, ancient forest, waterfalls galore, glaciers, wildlife (saw sealions basking on the beach). It is lush and green and unspoilt. The people there always seemed very friendly as well.
Can you tell I want to go back?
I would like to cycle it. It's hard to know what it would be like to cycle as I was in a coach the whole time. The North Island seemed very hilly...