I like the one too, and choose the S4 simply because of expandable memory and removable battery.
My only gripe about the one is that when you put it on a table, it doesn't lay flat. It rocks back and forth.
That's funny, I never would have thought to put it on a table to see how sturdy it is before buying it, but I would probably return it later if it rocked back and forth.
The lack of expandable memory and removable memory are a big downside for me as well.