The trees and water are amazing. The roads except major highways are grass streets- worse off than default XP11. My home town in default XP11 (KERI) is much better modeled and even has a working railroad line next to the airport as in real life. But the FPS on high end systems isn't where it should be. On my system in the A320 cockpit on the ground at a busy custom airport EGLL with weather set to stormy, I'm only getting 27-29 FPS. However, flying in the upper 20's seems much smoother with no stutter compared to XP11. The A320 is a joke in my opinion and the only smaller airliner of the 3 offered with Premium Delux. I've reached the point I miss flying by real world procedures.
All of the default aircraft have at least one issue with the autopilot or nav systems and all default aircraft have several inop gauges. Overall, its a great baseline "sandbox" to improve on, but with the half hearted models except for the lipstick pretty looking skins, I'm going back to my beloved Zibo for the time being. I'd rather fly realistic flight models until such a time a study level 737 is available for MSFS and FSUIPC7 works well without a 20+ fps drop. So don't bother trying to connect to VATSIM. Ending on a positive note, it will only get better as time goes on, and the screenshots are worthy of plane porn, lol

Should you buy it? I would wait until 3rd party devs offer noteworthy aircraft. There is also an upcoming patch due on Aug 27th to address some bugs and performance issues. If you are itching to bush plane around the world, I would say go for it now.