Aluminum unibody is more beautiful and rugged, but also makes the phone more slippery (needs a case). Camera exhibits more chromatic aberration than previous iPhone. Display still not as great as the HTC One X. iOS showing its age. Beyond those few minor complaints, this is best and most beautiful cellphone I've ever owned. Battery life is fantastic, performance is unmatched. It's a shame to hide it away in a case because of it's gorgeous craftsmanship, but it's scary not to as the phone is slippery and the black anodized one especially will chip if it hits the pavement. 9/10, best iPhone to date, best smartphone I've owned (I've owned 4 iPhones and 3 Androids).