I've now driven ~70 km on a mix of suburban, secondary country highways, and a twisty, hilly gravel road.
My evaluation: 9/10 - would do it again!
Keep in mind, I'm comparing against my impression of the car from last year. But the ride is not noticeably harsher and handling is not noticeably different.
Also note: I deleted both the F & R swaybars, since chopping coils increases spring stiffness. Rationale: a combination of weight reduction & avoiding a too harsh ride.
The front air dam is pretty low though! It scraped on one dip on the highway at speed, and I plowed a little bit of gravel off the crown of a gravel road.