Even though I never like cases, I bought one of the Nillkin ones on eBay as it was cheap.
Here is the link:
eBay - The UK's Online Marketplace
The funny thing is, I got the case over a week ago and got the wrong one. I got a cheap, rubbery one that was transparent and had no cutouts.
I wrote to the seller and he offered to send the right one for free. After a week I got the right one in black and I have to say I like it.
It is hard plastic
Has very nice feel to it.
Cutouts for camera, power, volume, etc.
Very slim and sexy pattern on it.
There are some disadvantages.
The cutouts for power and volume are a tad bit in the wrong place. This is not caused by manufacturer's carelessness, but rather by the fact that the sides that hold the case on the phone are rather slim and to not wrap around the phone up to the screen, but only stick out a tiny bit, so there was simply no space for them to be deeper.
On top and bottom, the case does not wrap around the phone, but instead there are blunt ends, that feel like they stick out and sometimes make it a bit uncomfortable.
All in all it is the best case available atmfor this phone IMHO.
P.S. Sorry about the poor description of the case, but I am not a native English speaker and it is very difficult to describe something like that. If you look at the photos of the case on eBay, it may be easier to understand what I am talking about.