The BF and I did this for the first time yesterday, and we were quite impressed with the offering! The effects were of much higher quality than either of us expected, and the hunt for the symbols was just challenging enough to keep us entertained. I assume it would be quite challenging for younger participants. The attraction is also very well-hidden; many touch points feel tucked away, which helped the intimacy of the experience, and there are far more of them than I had expected there to be.
There are two problems with the experience, however. The touch points have a bit of trouble reading the magic bands, so a couple of times we found ourselves having to rub our wrists all over the touch point for a few more seconds than felt necessary. Also, the touch points are starting to show their age; there's quite a bit of wear and tear on them, which could be part of the reason for the first problem.
Overall, though, we really enjoyed ourselves, and are both excited to experience different maps in the future. It's certainly no Splash Mountain, but the attraction is (to us) much more engaging and unobtrusive than Agent Perry's Adventure or Sorcerers of the Magic Kingdom, and felt well-thought out and like a good use of our time. The free Fastpass for Pirates after completing three maps certainly doesn't hurt, either.