Monkey C Monkey Do was a fun afternoon. We had seen it on the way down to the Maine Coast and decided to try it. It was a little bit pricey (~$40 per person), however the family rate made it much more reasonable (~$20 per person).
They take safety very seriously and made sure we all knew what we were doing before they let us out on the course. It was really a great team-building activity - you have to work very closely with your partner. The whole experience was really great for our group.
Everyone's skill level varied, but we all had fun trying. I saw some smaller kids fly through the course in no time at all! It definitely took me a bit longer. :) The courses do get progressively more challenging, and once you begin a level, you have to finish it. The staff was a great help and would talk you through the obstacles, but you do have to finish what you start - there's no quick escape.
They take tons of pictures for you and you can view them online, which is great. Overall, it was a fun way to spend a summer Maine afternoon!