I guess it depends how you measure "fantastic". They have quite a few expat pilots that have done 10+ years, which is an indicator things can't be too bad. Some of the recent resignations have been on account of long term pilots simply retiring after many years of service, so you can't draw any adverse conclusions about that. Others leave for other reasons, like being passed over for promotion, or falling out with management, or even just being bored with the A to B nature of the flying, but you can get that anywhere you go. They have a fleet of new helicopters, the money is good, the lifestyle can be great depending on what you make of it.
They will always have a requirement for expats, so that answers that question. There is no crew rotation, you are required to live in Macau. As for the money, that's a closely guarded secret but they are well paid. They have been known to hire people who simply go knocking on the Flight Ops Managers door, you know, like being in the right place at the right time and getting lucky.
Just give the man a call, I'm sure he'll be happy to answer all of your questions. Better still, go knock on his door with your CV in hand.