I got this lens recently. It's a rebadged Tokina RMC.
Not a bad lens, but I expected a little bit more... still, considering I paid 50 dollars for it (due to a small scratch on the front element), I'm not complaining, it has a nice look to it. It never really gets super sharp even at f8, but it's got nice colors and contrast. Bokeh is also nicer than I expected. I'm still getting used to focusing with it - it's quite harder than my 28mm lenses. And flare is definitely a problem decreasing both contrast and resolution quite a bit.
Both of these were shot wide open: