I haven't seen many posts or news about this lens on the Internet for some time. Maybe people have just forgotten about it with newer models on the market. This model has been discontinued for some time but you can still pick them up on eBay once in awhile. I got mine for a good price and I thought that it had something wrong with it, so good was the price. However, it has proven to be a good performer on the Nex and M43 series cameras. If it will perform well on the Alpha models remains to be seen.
One of the best things about this lens is it's size. It is very small as can be seen, and light. I wouldn't class it as a low light lens because a max aperture of f4, but if you've good light then it shouldn't be a problem and with high ISO images getting better and better it should be possible to us this in low light. I'll be trying this on the A7 in poor light, just to see if shutter shock or blurred images will be a problem. In my opinion, this is where IBIS comes into it's own and I wish the Alpha cameras had it. Now that Sony are co-operating with Olympus it won't take long to incorporate the Olympus IBIS into the Sony cameras. It's only a matter of time.