Have anyone used a Sigma lens with the a99 ?

I'm interested in getting some prime lenses for my a99. Sigma has a 50mm with HSM for only a little more than Sony's 50mm f/1.4 without a motor, and an 85mm f/1.4 HSM for a lot less than the CZ one. But, in the past, some of their lenses have not worked well with AF on new Sony SLTs.

Has anyone actually used any Sigma lenses with the a99? Did they work right off the bat?

Thanks!

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Jeremy Birn