This was an absolutely amazing experience. We just happened upon one of their brochures, quickly checked tripadvisor to see if there were any reviews, and now having gone ourselves, we can say that the 5 star rating is well deserved!
The cost is around 1900 Baht ($63 USD), so its not cheap by any means, but you do get a free round trip shuttle service from your hotel (if you live within a certain area), and you get to spend 3 hours on the course. They are great with the safety training and have a guide that follows you around the course (from the ground) to make sure you are doing everything right and checking if you have any questions. We did ziplining, balance beams, tarzan swings, rock climbing, net crossing, and every type of fun mid-air jungle activity you could imagine. It was quite a workout but they will help you choose the right level for you (typically starting with the easiest course and working your way up!) It was raining while we were there, but that was fine, it just added to the experience.
Overall, my fiance and I (27 and 26) had an amazing time and would recommend it to anyone with an adventurous spirit and a love for the outdoors!