Rock solid build. Feels substantial and sturdy on heavy glass, locks in nice and tight. Least amount of abberation/distortion i've seen from an expander. Great price, easy decision.
I purchased the Tokina Expander after doing a head to head with 2 other vendors . Tasted mostly Angenieux zooms. Specifically the 24-290 and 17-80 , along with some Vintage Cooke zooms and Anamorphic primes. Both the Kish and the IB/E did well but the Tokina seemed to keep the image more neutral and exhibit the least amount of aberration. It also happened to be the least expensive of the bunch. It was a no brainer .