I got in my XPL HD. It's an impressive light for sure!
First tests/impressions here in my old M12 review thread: https://budgetlightforum.com/t/-/27258/156
Resistor mod - really nice bump, here: https://budgetlightforum.com/t/-/27258/160
Edit/Update: For the Mission M12 with XPL HD I have, after more testing and usage with two cells, I'm seeing some flaky behaviors that seem to be related with a false LVP kicking in, showing the slow flash and fast flashing of the red LED around the main switch. Not sure if it's from my resistor mod, but I'm seeing the tactical/momentary mode shut off by itself, and med and hi modes kicking output down, all with cells that are near full capacity. The trubo mode seems to be pretty stable, but not sure of 100% good.
This could all be the same as what T18 is seeing, accept mine is aggressively resistor modded now, so can't say for sure it's not related to the mod.