As a user of four different private jet services, I can say I have been sold and experienced the agonies and ecstasy of all of them. Having used Sentient for over a year, I can say that they are the most service oriented. While not without occasional problems, and often it is hard to countenance delays and mistakes when paying for private planes, they always follow up with an apology and explanation. While in my experience apologies tend to be hollow, I value the honest explanation the most. Another benefit to their format is the ability to pick different types of planes in the same class. One can pick a slightly older plane, if for example you are taking kids on a short flight, or a much newer model if taking clients cross country. The ability to vary is something I value. In addition, their rate card is simple and their high travel days relatively few.