Well, I find this topic very helpful and enlighting because I am starting to doubt it's efficiency. I haven't bought one yet because I have done my research and some are complaining but also I have read good comments such as its the best hard wallet and easy to use. Maybe it's better to see it for myself. I try to contact the main supplier too. I am a bit scared about getting fake ones.
I would definitely buy from the main website.
the fact that it doesnt work with all micro usb cables is a bit of a pain in the ass. in fact, why not just make it like a thumb drive?
Where are you getting this? It should work with all micro usb cables. Are you accidentally using a "power" usb cable, one that has the data pins disconnected? You can get those sometimes with cables that come with chargers. The Nano S comes with it's own cable anyways.
I believe the reason it doesn't have a male USB connector on the device itself is that it would make it very difficult to press the buttons and read the screen on many computers/devices when it was plugged in.