Let's break this private jet business down, not quite literally. Used them to fly from LA to Vegas and back. Booked the flight directly from their website and it was very easy to book with no surprises. Getting to the airport was quite easy from both ends as the private jet terminals are separate and not busy at all. We had to be there at least 30 minutes before and that was plenty of time for us to get checked in and have time to enjoy their complimentary refreshments. They also provided complimentary alcoholic/non-alcoholic beverage on board along with a snack.
Service was great all around. We didn't check in 30 minutes before the flight coming back from Vegas (naturally right?) and received a courtesy call to ensure we were on the way.
The only negatives were the size of the aircraft with two seats on one side and one seat on the other, and also lavatory did not have running water.
Highly recommend going private for the amount of time you save.