My YJ is now lifted SUA (just since Friday). First time out on the trail, trying to get up on a rock, the front spring hits the rock (not hard) half way between the shackle and axle. On a SOA YJ, the rock would have slipped under the spring, hitting either the tire or the tie rod first. Could have been better or worse. For now, I'll have to wait until I have more experience with the lift to better understand the tradeoffs.