Got it yesterday from Henry's Canada for $188 in total.
First of all
there is NO "Quick Shift" like some reviews saying, i.e.
Pentax SMC DA 50mm f/1.8 Lens Review
If you try to turn the focusing ring manually it simply transfers your effort down to camera's focus motor shaft - this is the way to break the lens or camera or both.
Be careful and switch your camera to MF mode before doing manual focus.
There is no moving parts outside except the focusing ring, it doesn't extends, so it is good design since there are less chances to pump dust inside the lens.
It is surprisingly small, maybe because of absence of motor. My K-30 scared the hell out of me when it did the AF for first time since my other lens has Ultrasonic motor which is silent and fast. Especially when this lens does long AF turn making loud "vzzzeeeep!!!"
yeah, it is very loud. I don't know, this is my camera's AF motor or the lens mechanism making so much noise. I can not tell that AF is slow, for me it is not too slow nor very fast, just OK. It is all plastic fantastic, but the build quality is pretty good, no complains here. I have also feeling like AF is not always 100% precise when wide open, but it is not a disaster either. I need to test it more yet.
Optically it is pretty good, there is enough information on the net so I doubt I can tell something new here.
You can check my test photos which I did today during lunch time.
https://www.dropbox.com/sh/0m5rqftsq7kt057/RjHokUJ76o
- all are cam jpeg 'as is' of minimal size and crop.
There is no lens hood and the body design won't let you use the "snap-on" etc 3rd party solutions. The only way is to use 'screw in' hood of 52mm diameter which is existing (there is part number mentioned in the user manual ) and being sold separately . Looking at the competition it is hard to understand or explain such approach, i.e.
Nikon AF-S Nikkor 50mm f/1.8G Lens 2199 B&H Photo Video - wave motor, metal mount and perfect design, both caps, hood and lens bag -- all included and $217 only !!
My opinion: if you see it priced under $180 - get it if you need one. I don't feel like it is worth to pay more.