Purchased used - this lens was a pleasant surprise.
As to expected the lens is quite heavy, but no heavier then the competition. Build quality is excellent - operating it needs some getting used to, notably the push pull switch from AF to manual.
Also as expected - it can't compete in AF speed with the top players out there - too slow and a bit noisy, too.
But those are things you have to learn to expect from Tokina (or Tamron for that matter).
The bright side is the image quality - which easily rivals the like of Nikon and is visibly superior to the competition of Sigma and Tamron.
All in all - if you can get your hand on it for a reasonable price, while looking for a fast f 2.8 lens in that zoom range - you won't regret it.