1) The thickness. 18mm (almost 2cm!) is way too thick. The N810 was borderline too thick of a device for me (~14mm). There is no way that this device can fit comfortably in my pocket meaning it will have to be carried by hand or in a bag (I have a strict no belt-clip policy) either of which are extremely unattractive options for me. YARR! }:^)~ Tapt'n