I have a Tokina 11-16 F2.8(DX) and had a Tokina 28-80 F2.8 (FX) and Tokina 80-400 F3.5-5.6 (FX) before. I already sold both FX lenses and kept the 11-16 F2.8
The 11-16 for DX is a keeper. Its even better than the Nikon 12-24 according to most reviews.
The 28-80F2.8 is a different story. It should be a cheaper alternative to the Nikon 28-70 F2.8 (The Beast). This lens is soft wide open but at F4 up, it can stand on its own versus the Nikon. AF is fast and doesn't hunt. Colors are comparable to the Nikon counterpart.
The 80-400 is a little bit slower in focusing specially when there is not enough light, but picture quality was at par with the Nikon counterpart.
Tokina was founded by a group of
Nikon engineers who left Nikon to concentrate on the development of high-quality
zoom lenses.