My kids gave me a gift certificate for the 6 zip line adventure. The guides were terrific -- warm, friendly, competent and attentive. The scenery was drop dead gorgeous. I felt extremely safe. My kids just came along to watch and take photos, and thee staff were very accommodating. There is a bit of a hike to the first zip line and another between the first and second. These might be a challenge for folks coming from sea level, as they are steep in spots. But I'm 62, not in fabulous shape, and I did just fine. The zip lines themselves were nicely varied in length and speed, taking me through beautiful forests and meadows. The guides fostered a supportive, friendly atmosphere among other riders, and I felt we all left as friends. Highly recommend!