Heat, why the cold votes?

I think as Its still Expensive and most are not probably into photography/lenses.

That's a very nice way of putting it,
I have the contemporary version, will get some use at the airshow next week, great lens

Yes aha, great have fun! I was at goodwood a couple weeks back, its events and especially air shows where this comes into great use. Know someone who is renting this lens in a few weeks for same use.

I imagine some of the cold votes are because it doesn't say this is for the Sport version in the title, and the Contemporary is £789, so it looks like a bad deal. Was certainly my initial impression.

I got the Tamron SP AF150-600mm F/5-6.3 Di VC USD Lens for about £400 last year on the warehouse 20% thing. Was like new. Fun lenses. (I'm no expert). So if you see any on the warehouse maybe take the plunge.

I initially thought the price unremarkable because at no point is mention made that it is the Sport edition. Might be worth tweaking title for clarity.

Be prepared and willing to return a few samples of this lens if buying Amazon.
I returned a Sigma ART 50mm three times until I got a good sample - can't say if it was QC issues from Sigma or how poorly Amazon packaged the lens (no bubble wrap or anything to ptotect the lens box from the Amazon shipping box).
Despite complaining to Amazon, they contued to ship the lens with minimal protection. I'd imagine a long zoom like this would be even more susceptible to impacts and kockd than a prime lens.
Probably the worst lens packaging I've ever encountered.
Voted hot nonetheless.