The incipio silicrylic case has to be one of the best cases for your iPhone. I have dropped my phone and it has protected my phone from damage. It doesn't inhibit the use of buttons and it is not slippery. It's a well made case and even survived the microwave when my kids cooked my iPhone (iPhone wasn't so lucky!)
This is the 3rd color I've bought and I think they are the best. They protect the phone and the colors are great.