This is an awesome lens. It is becoming some of my friends favorite for their sports shooting.
Matt Duclos has taken a Tokina still lens and did an awesome job of making a cinema quality barrel housing to hold the elements. For the price, US$3495, it is really hard to beat. Seems like they are really back-ordered as well.
The lens is small and light. Check out the photo of the carry-on Pelican case with 2 Epics and 2 Duclos 11-16 mm lenses a RED Mag SSD Card case, and 3 LCD touch screens. This was for a 3D shoot, which this lens is great for. Another case had the other body and batteries and 2 RED EVF.