We really liked the Haleakala Summit / Lavender Farm tour on Maui. The crater is really beautiful. It's actually the main reason we're going back to Maui. I'm a hiker, and it's on my bucket list now to hike across the crater to the other side and back. From the summit on a clear day you can see the snow capped peaks of Mauna Kea and Mauna Loa on the Big Island off in the distance. The Road to Hana Tour on Maui was also very good.

As far as what we didn't like - the Hawaii Volcanoes Tour was very disappointing. You just get to see steam coming out of a crater off in the distance. Our guide was awful which probably didn't help our enjoyment of the tour. The Kualoa Ranch Tour on Oahu was also not one of our favorites. Here's a link to my review of it on Trip Advisor if you're interested. (I'm GUMO1 on Trip Advisor) http://www.tripadvisor.com/Attraction_Re...ii.html#REVIEWS
Overall it gets good reviews so maybe we just had a bad experience.

Also, Waimea Canyon on Kauai is very pretty and worth seeing. Maui and Kauai are our favorite islands, but they're all very beautiful and I think you'll enjoy your cruise.

Probably our biggest disappointment of the whole trip was we didn't get to see the Na Pali Coast on Kauai because it was pouring rain when the cruise ship did it's sail-by. So, I guess that means we have to go back to see that too. <img src="http://www.traveltalkonline.com/forums/images/graemlins/Joy.gif" alt="" />