Pros: This is a very good quality.lens., It is light weight for a 600mm telephoto, Auto focusing is fast, faster than I expected. This lens is very capable of producing sharp pictures.
Great price for a lens with this kind of capability and quality.
Newegg is an authorized Tamron dealer, So Tamron's 6 yr warranty is valid.

Cons: This lens meets or exceeds my expectations, So I can't complain, No Cons!!

Other Thoughts: I did quite a bit of research on this lens and competitors lenses in this price range, The Tamron 150-600 is very popular, and I can certainly see why.
I consider myself to be an enthusiast level photographer. I know more than your average entry level photographer with a DSLR on auto settings, but I am by no means a pro. I use this lens on a Nikon D7100. You will need to use f/8 to f/11 to get the sharp pictures hand held. The Vibration compensation works very well, but this is still a long focal length. so any movement is magnified. The lens is at it's sharpest between 150mm - 450mm It begins to get a little soft after 450 or so to 600mm it still produces good quality pictures.just a bit on the soft side. Any lens of this type will have similar characteristics, If you want to do wildlife or sports photography without blowing the budget, I highly recommend starting with this lens. There are plenty of photos on line taken with this lens. If you search a bit, you can probably find some taken with this lens on your camera. When I bought this lens, Tamron offered a rebate. I received the rebate check less than three weeks after I sent in the paperwork.. I have never had this kind of good service with any rebate offer with any other company, I will definitely consider Tamron for future lens purchases. Newegg, as usual was also very prompt in shipping my purchase.

Pros: Very sharp from wide open to f8 where it reaches max sharpness at 600mm .. the lens renders great detail on my d810 36mp fx camera which is very impressive for a lens of this price .. the vc is top notch at reducing camera shake .. the eband coating tamron uses makes flare virtually non existent. very solid feeling lens well built and comes with a 6 year warranty from tamron! BUY IT NOW!

Cons: NONE worth mentioning

Pros: Very sharp focussing. Excellent results so far.

Cons: Heavy. Made in China!