lol, sorry, I haven't received my S4 yet, but I have ordered it from vodacom online. I've chosen the S4 as, all things considered, I feel it's the best device. I'm saying this before you tell me i'm just a hater.
The S4 has a poor build quality and that video is laughable. They submerge it under water for 12 seconds and it's still perfect? They drop it on a rock hard surface, hundreds of times, and there isn't a scratch?.. Yet they don't market it as water resistant? Scratch resistant? Oven resistant? Shock resistant? C'mon, watch some drop tests online.
It doesn't matter what Samsung claim to do in their factory. What matters is how durable it is in the hands of the consumer.. And in the real world, one small drop and that phone will most likely shatter/crack.
Just to be clear, when I say "poor build quality" i'm referring to durability. When it comes to design, it's amazing how they've managed to keep the phone small whilst fitting everything in there (that size battery, and that size screen).. Plus polycarbonate is better in terms of signal and weight..
Again, taking this into account, I still think it's the best phone on the market atm.