I did a tour with Wings Over Kauai
http://www.wingsoverkauai.com/photos.php in their 172 when I was there a few years ago. I wanted to get checked out but there were no rentals available on Kauai at that time, probably not now either. It was just me and Bob and he offered to let me fly from the right seat but I told him I may as well enjoy the view and take pictures. He gave me a pretty good deal though, under $200 for nearly two hours. It was pretty spectacular scenery and every few minutes Bob would point out things like "There's the hotel where Elvis filmed Blue Hawaii", "There's the beach where Harrison Ford crashed the Beaver in "Six Days and Seven Nights", "There's the waterfall in Fantasy Island", There's the waterfall from the opening scene of "Jurassic Park", "There's the beach from King Kong".......
Then there was the stunning Na Pali coast which can only be seen from an aircraft, boat or on foot and where the ancient Hawaiian royalty lived.
But despite the grandeur of it all I could sense that after 14 years of flying folks around that little island Bob was a little burnt out on it. I guess there's always the pitfall of too much of a good thing.