This is my first lens that I actually bought and didn't recieve as a gift. It's a quite good one. There are a few nuisances with this lens, but I don't consider them to big.
I ordered this through Wolf Camera because they didn't have it stocked, and so I couldn't try it out first on my camera. After a couple weeks of using it, I have started to get un-"used" to wide angles.
The camera is quite picky about focusing. 95% of the time it is spot on. But for the few other times, it needs a certain of amount of difference in colors. Hard pictures to focus include clouds and dark objects.
This is an incredible lens. I probably will use it in all cases were I have control over the picture and don't have to worry about zooming. It'll fit anywhere and the focusing can be perfected with some days of use. I'd suggest buying.