Mine worked like a charm, straight out of the box. Came with correct AC adapter, both uSD ports worked great, both USB ports also checked out with no trouble.
The only issue I had was getting the registration to go through. The first license key was "already used". This morning I received my 2nd license key, it worked perfectly, and so I updated via the system update app.
Nary a hint of trouble.
Since I'm an electronics tech, I may consider getting a replacement glass screen, and I might also look into getting some better batteries. I haven't pried my unit apart yet, but some enterprising hackers have, around the intarwebz, and it looks like it's not too difficult.
It would also allow me the chance to tweak the uSD cage, making misalignment less likely in the future.