I've had my '14 Prototype Mountune Springs on for 18k miles with stock dampers so I was looking forward to seeing the changes however I've only drove 10 miles on them after installation to check for any creaking or quick changes I needed to make. The springs need to settle so I will save full impressions after a couple of weeks. Basic impressions are it's much more comfortable than springs/stock damper combo. This being major surprise is that I actually feel the ride is considerably more comfortable than springs alone and I wish I would have done this sooner but it wasn't available through Mountune so I'm glad I waited. The overall handling is so much more planted and sure footed during mid-corner bumps. I'm looking forward to some canyon/track time to see how they react during lift off oversteer.