the test isn't super difficult, but I would agree with zebhaney about getting the study guide. It's pretty invaluable in my opinion. Getting the certification is one thing, but the things you'll learn are pretty valuable too. There is a whole section on things like soil and how to choose the proper kind (course or fine) for tree transplants, tree anatomy, diagnosing diseases and pests, lota cool stuff. It was a good learning experience. Believe it or not the climbing aspect only took up maybe 2 chapters out of around 10 or 11 I think. Don't just do it to pass...grab all you can from the book it's pretty informative. I took mine at the same time as a study course that Bartlett Tree Experts offered their employees. The two were very similar, so I got alot of info ingrained in my head while studying for both.