But you get neither the quality (visual and tactile) of a Nikon or Canon L nor is weather proof nor should you imagine that you get the performance of Zeiss at a bargain price or a G lens with no boundaries.
The lens is good - no question. When 2.8 becomes rough (who is already) and otherwise decent performance. But it is also not spectacular. Who Sony / Minolta lenses G and loves, here is not happy and who "3D Pop" is a Zeiss fan, either.
Who wants what sound for pleasant price: Buy Now!
Who is a "Wooooow!" Lens will or professional is -> Zeiss.
4 stars, looks Weil's really too cheap.