I've had the PLM version for a couple months now and have had a chance to try a lot of different scenarios all with pleasing results.
This is the last one that gives me the confidence to use it any time any where. I shoot with back focus spot focus with the 1.4 TC and without and up to now free handed (the basic reason I purchased it ). These are cropped to the N'th degree and I have included the original Pic. Aircraft 6.5 miles away in upper atmosphere hand held with spot focus.
Sub Info : Hand Held by an Old Guy; one eyed with so many Health Problems that to shorten the response to "how are you" I just respond "I'm not pregnant; the tests for Insanity are inconclusive but I've got or getting everything else !
Terrific lens and I'm good to go ! Might even try using a pod from Time to Time
Edit : Sorry these shots were focused @ 9 point; not spot