This was my second Grand Canyon helicopter tour, the first was with another company (in the spring, not the summer). The tour itself was almost identical with both companies, and both were top notch. We booked an 11:00AM departure, but with temperatures well into the 100's, this is the latest I would want to depart. The return trip was HOT! I was in the front on the return, and with all the windows and extreme heat I was feeling a bit queezy by the time we landed. Good thing I was drinking plenty of water. Keep in mind, these helicopters are made in Europe, as well as their air conditioning systems. They WILL NOT keep up with the extreme heat of Las Vegas summers. I would definitely book a morning flight, and the earlier the better. Using Maverick was more convenient than the other company, as their base is at the Las Vegas airport. With the other company, they drove us to Boulder City and that is where we flew in and out from. Our pilot was very friendly and informative, and their facilites were great as well.