Fair enough, the bells and whistles are indeed just that.

Of course, many people find that those bells and whistles enhance their ereading experience and make it much easier to handle their library,
if you use calibre with your android device, it is practically a must-have, due to its outstanding integration with calibre.
If you have only just bought CC and you decide you do not need it (because you are happy with something more basic), then you should be able to return it for a refund. Or keep it and see if you fall in love anyway.