Just got back from Maui a few days ago. Obviously, this thread pretty much has everything covered, but I'll submit these opinions:
-The dining is overpriced and underwhelming. I'm not a food snob by any stretch of the imagination, but I only had a handful of meals that I would consider worthy of recommendation.
-The road to Hana is a must. I was almost talked out of it by several people who said it was a slow, long drive with no destination, but my stubbornness prevailed. We drove through Hana to the Pipiwai trail, explored the coastline, hiked to Waimoku Falls, continued driving around the island (clockwise), and were back at the resort (south Maui) by 4:45pm. It was an absolute blast! The roads south of Hana can be a bit treacherous, but it's worth it IMO.
-Warren and Annebelle's is awesome. We were selected to be part of his act during dinner, so we were literally seated just feet away from Warren for the show's entirety. Recommend the royal flush package.
-Don't underestimate how cool the temperature can be in some parts of the island. Mrs PharmD4 wished she had brought a light jacket on several occasions, despite my recommendation to do so.
-Snorkeling/beaches/ziplining -- as advertised.
-Take plenty of pics.
This thread was useful in my planning for the trip...especially the rec to read Maui Revealed. So thanks to everyone who contributed.