It's good. It is a beta release, and there are small "glitches" but Ryan is very responsive in real time. For me, that is a big part of what makes this release so good. The flight model is really well done; landing (so far no crosswinds yet) is really smooth and satisfying. Systems depth is great, even though "glitches" are present.
The biggest glitch (currently) is the vanilla GNS530 unit's inability to track the GPS flight plan. It works as a moving map, and you can fly via HDG to follow your course, but there is no capture by the AP. The HSI is properly coupled, so as long as you keep the needle matched you're In Like Flynn. (Probably showing my age on that line, eh?).
As mentioned, Ryan is aware (real time) and I anticipate a solution or a patch in the coming weeks. The GTN750 from PMS50 and the TDS GTNXi are both supported and both of those units are apparently working just fine. The C414AW is good enough it may spur me into trying out one of those avionics packages just for this aircraft.
It is a notch above any conventional piston-engine twin currently available in MSFS, and while not as complex as the DC-6 from PMDG, it has a system depth that "feels" similar. It will take a few hours in the left seat for everything to become second nature. It's a great Cabin Class Twin, and you can feel it when you fly it.
Kudos to Ryan for doing a fine job!