I'm not the OP but I was in the show and was able to use them after it finished. Yes its a nice phone but in comparison with other phones out there (HTC One, Xperia Z, even the iPhone 5) the S4 looks cheap. Its the product of "lets see what we can stuff in there, the more the better".

The testing conditions weren't ideal but half of the features (translation, scrolling without touch, etc...) are still half-baked, or they definitely look like they are. And Touchwiz as UI seems really bad now that stock Android has become so appealing in design.

So yeah, its a really powerful phone with good potential ideas but the package, looked as a whole, looks cheap.