First impression: wow what a Klopper! Sure, the S5 is not small. Accordingly big is the shell.
For me, it is, however, not clunky - I have big men hands.
The provision is self-explanatory: silicone sleeve from the hard shell out - put over's smartphone, hard shell over it - that's it.
Good thing: a screen protector is also included.
For heat generation: of course the cover is warm. (Warm, not hot.) A natural process, if you hold the plastic parts a little longer than a few seconds in hand. The smartphone is indeed in a warm environment by body heat. The heat development is, however, even after an hour in his hand and Youtube videos look completely normal and does not feel hot or otherwise alienating.
The buttons can be operated excellently despite the silicone sleeve. The auxiliary jack is free enough and is to be used for plug with a thicker jacket without fumbling well.
Only the flap (the rack) on the back to comfortably park your smartphone to read or to watch videos, makes me a little worried. Yet it was her turn. With proper care, they will continue to do it hopefully. You can rausholen simple and remains safe in the depressed state in hardcover.
However, the attachment does not look very stable and I fear that it will hold less than two years.
The stand, however, was the main reason to buy.
Should the stand after a year break, I'm going to buy myself this case for the price again.
For price, feel, and quality - the bonus point - the fast delivery, there are five stars.
Should the stand abort, I'll get back to this point again.
*** Addendum dated 09.04.2015 ***
The flap for standing is still off, despite regular use. Top!