If you're on the fence about a helicopter ride, and further on the fence regarding a helicopter ride with NO DOORS, please let me nudge you...it is WORTH IT.
Kauai Air Tours is a professional outfit from their office staff to the pilots...we flew with Brodie who is a consummate professional, knowledgeable native to Kauai, and a pretty bad ass pilot. He was informative throughout the tour and shared island history, best views, and personal insights. As great as he was, though, it all pales in comparison to floating above some of the most gorgeous scenery imaginable. The tour covers major sights you need to see like the Na'Pali coast and the Jurassic Park waterfall (yes, they play the music!) but even between the major sights, you will be constantly agog as you see the whole island from above.
They provide you with jackets so you're not cold, you're safely strapped in, and the ride is smoother than you'd think of you've never been in a helicopter. You can only bring your cell phone and they give you a rubber lanyard for it so you don't lose it out the open door...but don't get overconfident. It is WINDY in the helicopter and it is SUPER windy outside...keep your hands inside and you'll get home with a phone full of great pictures and video. Stick your hand out too far...that sucker will be gone. Ask me how I know.
Put simply, I lost my phone on the second day of our Kauai trip and I STILL think this tour was worth it. It's a once in a lifetime experience.