Back when Do Not Deliver were building several reworked CL600 (aka CC144s), I had the pleasure of flying as ballast with the ex-Chief Pilot of TAG Aviation who probably has more hours on type than anyone. He thought the 600 was much underrated but there were two things that made a big difference:
1. You needed to keep ahead of the aircraft so throttle movements are smooth - you can be rewarded by compressor stalls if too harsh
and
2. Get a crew chief who knows what he's doing to keep the engine nacelles' panels correctly aligned or you won't get decent range.
One good thing about the Lycomings is that you get sufficient windmill energy to keep hydraulics up without the RAT right to touchdown...