My 00DII had the HG's done under warranty at 38K. I'm doing HG's at this time at 193K. I only had slow / oil / coolant 'seep' at the front, outer corners of the heads, nothing 'blown' per se, but seemed to be getting progressively worse, more than I was comfortable with given my once/twice a year long distance expeditions.
Who ever the LR tech was at the time working at LR Northpoint, Alpharetta, Ga., did an excellent job. Black RTV in all the right places, the gaskets still looked good.
Although not the 200K plus service Ive always gotten from all my Fords, Ive been content with my 193K Ive gotten with my truck. I think there's some truth to the high mileage service some folks are getting from their motors.