as far as the cost, I honestly can't say, because we just paid the $10 or $15 difference to "upgrade" our 30 minute complimentary repeater guest massages to the treehouse during our second visit there, but I can tell you it was DEFINITELY worth it!! In fact, you can read about what I had to say about our treehouse massage experience on couples' website here: http://couples.com/negril/photos.php ... which was pulled from one of my many message board posts.
Regarding Andrew, he was there during our 2008 trip, but not during our 2010 one. However, we got to know some of the new entertainment staff and they were all super!
We've had the treehouse massage and also the beach massage...both are so worth it, be sure and try one. I think you can find the brochure online under the spa tab. Andrew has moved to the states. He was going to college, studying hospitality/entertainment management. He's currently living in Destin FL, seems to be doing well for himself. I keep up with him on facebook.