The performance is pretty good. It is a little bit of a pain to set aperture (actually, it is more of a pain to make sure it doesn't change...)
It is very sturdy though, and the lack of AF doesn't matter too much for landscape shots (which is why I bought it). Focus so the focusing scale says infinty is fine and snap away...
And the price wasn't all that bad for a lens that has shift control...
I have this lens and also the Canon 45mm F/2.8 TSE lens. Let me tell you... for the price the Arsat 35mm f/2.8 PCS is a steal. Very fun to play with and provides fantastic photo's for the price. Funny, I was playing with both lenses today....