I admit, its pretty late writing a review about iPhone 3GS since it has already been taken off from the market after the launch of 4, 4S, 5, now 5S & 5C.
I am in love with my phone. Like everything about it. Much much better than the android available in the market at this price range. Have been using this phone since 3.5 years flawlessly. The only problem faced is that if the battery backup. Its pretty poor. I often treat my phone as a cordless phone & never forget to carry its charger whereever I go.