I'd have to agree overall really good but he is a bit brutal on 3rd partys
It was The Digital Picture's review of the Sigma 85mm f/1.4 lens that convinced me to go ahead and buy one (and as you know it's awesome). Perhaps the reason he is a bit harsher on third party lenses is because of what he says at the bottom of that particular review, meaning these lenses need to justify their value proposition beyond mere image quality:
My standard disclaimer: There are some potential issues with third party lenses. Since Sigma reverse engineers (vs. licenses) manufacturer AF routines, there is always the possibility that a DSLR body might not support a (likely older) third party lens. Sometimes a lens can be made compatible by the manufacturer, sometimes not. There is also the risk of a problem that results in the lens and body manufacturers directing blame at each other.
5D Mark III, 40D, 1V. Bunch of strobes, lenses and other bits.
They're, their, there, it's, its, too, to, than, then, you're, your. One lens, two lenses, the lens's aperture.