The aircraft will be your own for the duration of your requirement. Minimum queues for customs and catering (if available on the aircraft) will be as you require.
Generally you can fly anywhere without other people bothering you, and not to airports miles away from your required destination. This can certainly save time. This could save money too in not spending such on long taxi rides to where you actually wanted to go. Helicopters certainly come in to their own on occasions like this. Aother consideration.