I dont know much, but......
I talked to one of their pilots while on a short layover in San Jose, CA. He seemed happy with the operation; said the CP was mellow, schedule was decent (O/C except for something like 6-8 days off/month, 2 hour response from page to showtime), and that most of their pilots were happy. They have a bunch of king airs, a bunch of citations, and some Lr 45s, a challenger, etc. Yes, they are based outta SNA. I think their website is something like westcoastcharters.com. If not, search Yahoo.