I got this for the iPhone, Nexus as well as the S3 - my review will be the same for all:
This one is awesome - made of thick sturdy silicone, making it rather huge compared to the phone - this is a plus as well as a minus. It provides good protection, but of course, unwieldy, and makes it difficult to operate the phone (it's pretty awkward to even hold the phone). However, it looks incredibly cute, and gets a lot of attention and laughs. The cut-outs are quite well placed, although it's difficult to charge it - you need to push the mini USB end a little hard for it to make full contact - but once properly connected, it stays. The raised bits for the volume and power buttons are very effective, just a slight push and they work. Word of warning: the ears do not rotate, making it next to impossible to put it in pant pockets, especially jeans. Overall, lots of fun, and good enough for occasional use.