Cold-hearted orb that rules the night,
Removes the colours from our sight.
Red is grey and yellow white,
But we decide which is right.
And which is an illusion?

Pinprick holes in a colourless sky,
Let insipid figures of light pass by.
The mighty light of ten thousand suns,
Challenges infinity and is soon gone.
Nighttime, to some, a brief interlude,
To others, the fear of solitude.

Brave Helios wake up your steeds,
Bring the warmth the countryside needs.

I got mine a couple of months ago and am still learning. I've started to get some really good results with stationary subjects.
For me, handheld at 600mm means I need really good light (shutter 1/1000).
With a monopod I can do much better.
The best aperture seems to be f8.
On a tripod, one really needs to remember to turn the VC off or you will get blurry images.
Also....Tamron advises turning off VC when panning.
I think the early hype suggested that VC worked while panning but they've changed that story and their manual.
I have yet to get any BIF shots worth keeping but I haven't made a major effort yet either.
The lens is capable of producing great results and at the price it's remarkable but.....it's still a really long tele and not the easiest thing to master. YMMV