Regarding ACASS, there is always 10% who "love" something, and 10% who "hate" it. On balance, I'd say to go with ACASS if you have to, but be prepared for the worst.
The owners and other top management are not "nice people". They will screw you and walk away from problems, leave you hanging, and have you fly with people who attest that they have 2,000 hours PIC in type, yet can't close the door.
It's their business model, charge a lot, and pay out little. It seems to work for them. G550 guys get paid 10-12 grand US each month, no benefits, you pay for your training, no pay when not flying. You will not be staying at the JW... That's less than half the going rate. CL604 guys get a little less. Finola can correct me if things have changed.
FR
It's better than working at Walmart!