My wife and I booked a Zipline tour through Botanical World Adventures before leaving on our trip. We originally were going to go with another company that had 1 more line (9 vs. 8), but after reading abysmal reviews of the other company, we went with Botanical World instead. It was the right choice! Check-in was easy (we signed our waivers digitally ahead of time), and we were lucky enough to be a small group of just 4. Our guides were Lish, Paiton, and Kanani. They were simply amazing! Very knowledgeable, super-friendly, and well-trained. We have done ziplining a few times in the past, including twice in Kauai, but this was our first trip to the Big Island. We always had fun doing it, and this time was certainly no exception. We would gladly come back again in the future. It's worth the 2-hour drive from Kailua-Kona!