I bought sky park yesterday and had a quick run. It seemed pretty cool and definitely a better UI than AH2. Also the focus on flying is great.
What is not so great is that today there was some kind of update and I could not get it going properly after that. Screens took up to 10 minutes to load and it hogged my CPU to 100% the whole time. I spent two hours - yep 120 minutes trying to take a flight , rebooting my pc several times, trying different launch sequences, but CPU remained over stressed to the extent that even Ctrl Alt Delete for task manager took upto 10 minutes to pop up.
Not sure what the update was, and I haven’t changed anything, but it was sadly unusable.
One the one occasion I managed to load a flight, the displays of the aircraft wouldn’t switch on. Very bizarre and given my experience in the lack of stability of this game, I am tempted to suspect yet more issues with MSFS rather than Sky Park. Anyhow I would caution against investing in this addon for now especially if you have experienced high CPU load, or the game locking up generally.