This is a small tablet with a phone function. I see no advantage of this compared to the One other than the expansion slot and they should have just put a slot on the side since you can't replace the battery anyway. Just another me to device.
HTC, you just like to frustrate consumers. Great speakers, display, and chassis. You fixed the power button location and the no MicroSD issue. But why have the whole back be removable to swap something a 1/4 the size of a postage stamp and not have a user replaceable battery?