My experience with ISV was amazing, the fun activities I did in one month does compare to anything I had previously taken on. I've had itchy feet since and want to travel some more.
Through ISV I got to see major tourist attractions from Queenstown to Auckland. I went spelunking in dark caves, kayaked with baby seals, did the 3rd highest bungy jump in the world, saw crystal clear water near the Remarkables (mountains in LOTR!), climbed a glacier next to a rainforest, enjoyed geothermal mud baths, and the list goes on..
I was lucky enough to be at an excellent volunteer location. We were 10 people on a secluded island doing conservation work. It was very refreshing and I absolutely loved the outdoors!
The staff was very friendly, helpful, and looked out very well for our safety.
I do not regret a single second of my trip which has thus far been a trip of a lifetime!
ISV itself is a very flexible organisation; my emails were promptly replied and reasonable requests were indulged.
What would you improve about this program?
Perhaps make some of the extra attraction (and costs) known prior to the trip so financial arrangements could be made.
For example, I wanted to see Milford Sounds and do sky diving, but was short of cash. Would have brought more money with me had I known.