Over the last 18 months I've flown a Hawker fairly regularly. Both 800 and 800XP. I feel I should uphold their honor because I think it's a pretty nice airplane. It's not the fastest or highest flying, but the range with its 10,000# fuel load is quite good. It's a nice flying airplane with straight forward systems.
I don't see the big deal with the TKS. The idea of an anti/deice system is to allow you to get out of the ice. By not taking thrust robbing bleed air to do this a TKS system has an advantage. From the pilot's standpoint you bleed it for a minute on the ground and turn on a timer if you need it. Simple.
I don't know about special wrenches. I'm sure you need them for a Hawker. But there's not any modern aircraft or car for that matter that doesn't require some special maintenance tools.
So quit knocking Hawkers.I'm greatly offended.
And btw the dispatch reliability, at least for the trips I've been on, has been 100%.