Good Lens and good price. Compliments my a6000 nicely. At 50mm, it is mostly a portraits lens. That's not to say you can't use it to take a variety of pictures. The focal length at times makes it challenging to take anything but single targets, especially indoors. I feel this is where it is best used for. I don't think I would ever just bring this lens with me without another lens with a shorter focal length like a 19mm, 30mm, or 35mm. On the plus side, the 50mm is less intrusive to the subject's space.
For example, I brought this lens with me to the pool hall to take pictures of my brothers as they played. Though it was nice that I wasn't really distracting to them as they played. I found myself having to go as far as 2 tables to capture anything more than just upper body shots. I'm pretty sure experienced photographers already know this, just letting those who never used a 50mm APS-C lens know what to expect.
As for the quality of the photos. I'm still a beginner, so to me they look very good. Sharpness is good. AF is silent. I find the photos pretty sharp at f4-f5.6. Lowlight is great at f1.8-f2.8. Bokeh is good. Video is fantastic with OSS. I really can't complain about anything other than getting used to the focal length. I mostly take photos for enjoyment. So far the pictures taken by this lens have given me joy. I know probably down the road I will get something more expensive and better but for now this will do. There are only 2 50mm-60mm e mount lens at the $200-$300 price range. I chose this over the Sigma 60mm f2.8 because of 3 reason: OSS, f1.8, and the fact the SEL5018 uses 179 phase-detection AF points and the Sigma only uses a small portion of the center. Not to mention the price difference is only $90.
If there was only one con about this lens, it would be the slow auto focus. It is fairly slow but not so bad. Takes about a second to focus. If you're using this only to take portraits, it shouldn't really be a problem.
If you're trying to decide to pick between this and the 35mm f1.8, just know that the 35mm is more of an all-around lens and this one kind of compliments it. I always bring both with me when I go out. My 35mm usually stays on my a6000, while I bring this out for certain situations or when I want a change of perspective and want to keep my distance a bit. Best to get this if you already have a 19mm-35mm. You can get a Sigma 30mm or 19mm and this lens for about the same price of the SEL3518. Even better, you can get the Sigma 19mm, 30mm, and 60mm for less than $600. I ended up with the SEL3518 and SEL5018 only because I knew the lingering thought of OSS and f1.8 would always haunt me. I would have ultimately bought the sony e mount lens anyways.