For some strange reason all Samsung products I have owned fall apart very quickly even though I take extreme care of them. I once had a refrigerator from them and the shit left my food warm even though the settings were set to max so I got some spoiled meat.
A friend of mine owned one of their TV's and the screen began doing some weird flickering just 2 months after their purchase date.
I had the S4 and within 1 month components began failing such as the mic & speakers.
My Samsung microwave has been brilliant, can't wait to upgrade to Samsung Galaxy S4.
I actually have a S3. Great phone, great battery, good features, great screen, extremely easy to use. Just a shame the back casing is so crappy, the plastic is chipping everywhere.. will probably move to Sony next, their phones seem to be improving so quickly (had the Sony Xperia S before, loved the phone but had a lot of annoying issues).