I have been looking for a case like this for my Galaxy S2, even before my phone arrived, having had a similiar case, in acrylic, for my Cowon S9 mp3 player. The Case-Mate Barely There Case is simple, subtle - it fits so well, and is so light that you won't notice it's even there, and tough enough to take the impact from the occassional fall onto a pavement. The case simply snaps onto the phone in one easy and satisfying click, and once on seems to fuse seamlessly with the handset. It's design means that the case does not impinge on the Galaxy S2's stunning 4.3-inch screen which, being made from extremely durable Gorilla Glass, needs no additional protection itself. All of the cutouts in the case align perfectly with the buttons and ports on the handset, and the case can be left on the phone at all times except when you need to change the SIM, SD-card, or battery. Knowing how easily scuffed the corners of my phone are, and unwilling to put the durability of the battery case to the test, this is a must have purchase for anyone who wants to protect their Galaxy S2 without compromising on it's sleek and razor thin design.
UPDATE: I HAVE REVISED MY ORIGINAL 5-STAR REVIEW AFTER DISCOVERING THE CHINK IN THIS CASE'S ARMOUR... IT'S UNFORTUNATE, AND EASILY RECTIFIED BY REMOVING THE CASE WHEN YOU NEED A SAT NAV, BUT MY PHONE COULD NOT ESTABLISH A LINK WITH THE GPS SATELLITE WITH THIS CASE ON. DEALBREAKER? NO, BUT IRRITATING, ESPECIALLY IF YOU USE YOUR PHONE AS A SAT NAV AS FREQUENTLY AS I DO.