Agree with your post on many counts, though I don't agree that the 12min they charge to refuel (this is SkyJet, didn't look into NetJets as heavily) is a big deal. If you're only one or two people; or you're picking up a client, why would I rent a Challenger when I can get a LearJet 30 and pay for the small jet pricing rather than a large jet price?
And yes, being able to fly into a small aeroport and not deal with security is nice. Can save A LOT of time - just being five minutes from where you need to be, rather than 1h from the aeroport.
Waste of money to not fly JFK-BOS on a regional jet of some major airline.
My ultimate goal is to eventually buy a GIII or Challenger, have NetJets maintain it, make money when I don't use it, and use it when I do so I can cover costs. Looks like it can come pretty close.
I'm looking forward to the new LearJet that is coming out. The most important thing to me in a jet is a place to work (be it a table or a tray table), and 180 degree seats. A couch that pulls out is great, but not necessary (maybe the day I am a billionaire, heh).