I read the reviews of this (and could see for myself from the pictures) that this is a stand, and not a charger for the phone - so I knew exactly what I was getting. Why on earth it isn't a charger as well I don't know.
What isn't clear in my view is that this doesn't come with a plug and micro USB cable - so be aware you'll need one.
I bought this because I wanted a spare batter, and something to charge it other than swapping it into my phoen to charge. What I didn't realise (and am very pleased about) is that the entire charging unit fits into my existing charging dock: http://www.amazon.co.uk/gp/product/B00871FVX0/ref=oh_details_o04_s00_i00
It just slots in just like my phone does, which means I don't need a second plug and cable.
All in all, I'm happy with it - I now have a spare battery and charging case for the battery. Four stars due to the fact that it doesn't charge the phone at the same time as the battery (though I was aware of this before buying).