I've always wanted to fly in a helicopter so we took a trip to Vegas just for this. After researching a number of companies we decided to go with Serenity, and were very happy we did. Our pilot (Kristy or Christie, not sure how her name was spelled) was terrific. She was kind, fun, and informative without it feeling forced like she was putting on a show. She let the tour speak for itself. All of the staff was also great, constantly offering free drinks and wanting to know if there is anything they can do to help.
We paid extra for a couple things and are glad we did. One was to have a little picnic at the Grand Canyon, it was fun to land and take-off an extra time, and was also nice to enjoy a little time at the canyon. We also paid for the front seat guarantee. This cost an extra $50 p/p, but the views from the front of the chopper were quite a bit better than the back, especially if you are in the center seats in the back.