This is a great, minimalistic case for a great, slim phone. The Ultra Thin Air adds very little bulk, and therefore helps maintain the integrity of the phone's design. (I hate the huge ol' Otterboxes...take any modern, sleek phone and then make it a big, ugly brick with an Otterbox! But I digress.)
The only caveat to this Spigen case is that while it LOOKS slick (like, really nice), it also FEELS slick (like, it's slippery.) This could be both a plus and minus.
I hate cases that don't allow you to slide them in and out of your pocket. This case from Spigen allows for easy in-and-out of pockets.
I also worry that I could possibly drop the phone because it is slick; no grippy-ness at all.
Overall, I like this case. I think I will use it as my walk around case for now. Lovely that is comes with one screen protector. FYI, Gorilla glass CAN scratch. Just one miniscule piece of sand in your pocket, and it is over.
--FYI, I have a bigger, more bulky case from CaseMate called the Pop! with Stand Case. I like it too, but it is bulkier. The plus-side to it is the little (slightly cheap-o) kickstand on the back and the grippy sides. You might check it out too. Case-Mate CM021166 POP! 2 Case with Stand for Samsung Galaxy S III - 1 Pack - Retail Packaging - White/Black Harder to get in and out of my scrubs pocket than the Spigen Ultra Thin Air, but never any danger of dropping accidentally.
Thanks for reading! LOVE my Galaxy S3!