As i said above: if you wanna use your smartphone and/or a pad, you can choose between 100s of devices. Every manufacturer has a product in it's range (even B&O with the essence).
The moment is just of interest, if you wanna separate your digital music from other electronical devices (with the possibility to use them either). As a moment user it is not of interest, if an iPad can do much more, because the separation is wanted.
You can complain the software bugs, the quiet slow problem solution of some bugs, you don't have to like the interface, but don't complain the concept. if you don't like it, you don't have to buy it.