The big advantage with the coilover spring perch, is the ability to adjust the height by just jacking up the car, reaching in, and spinning the threaded collar.
Road noise seems to be reduced.
The stock ride gave me a very good idea of what kind of surface I was riding over but the one setting shielded me from that. This setting is the one to use for steady highway cruising. Ride was just a little stiffer than shock in the compression side and maybe a little softer on rebound because the overall ride was still better than stock. On 3's at all fours, the car exhibited very good turn in response. Ride is starting to become rough on bad roads.