No 75s, but we have several 45s. They are pretty good at reliability. I can only think of a few times in several years where I've had to go back to the hotel. Of course, our MX department is rather large and our guys work their butts off providing excellent MX for us.

Can't comment on the avionics, but I can say it's a great hand-flying plane. I think you'll love it from that standpoint. We routinely fly 8 pax and have plenty of baggage space for a typical flight. If you start going out for 5-7 days, and they want to bring golf clubs, then it can become a challenge.

I don't know what issues, if any, the 75 will have with CG, but the 45 (heavy avionics, permanent/fixed aft ballast) can be tricky at times. If you're doing a shorter leg (~1 hr) with 8 pax and no bags, you'll often have to load up a ton of ballast in back. Can't take enough fuel to move CG aft enough due to landing weight issues.

APU heats great in Winter. Summer it can be a bit lacking. It's definitely more Challenger-like. Not really a Lear at all...looks like one and has the name, but systems are very Bombardier. (I have not flown a legacy Lear, but spoke to those guys about it, and I do fly a Challenger.)

Overall, great airplane, IMHO.