After five years as a first-time owner, I learned the hard way that the Piston Power “Tip-to-Tail” is not the comprehensive coverage it sounds like: only specific listed items are covered, rates rise unilaterally every year, and you forfeit your entire engine-overhaul account balance if you don’t renew (even when the prices go up and the coverage level drops). I wish I’d had an attorney and mechanic review the contract first. Read my review on the Diamond Pilots Association website to avoid making the same mistake.