I have had my X1 for almost a week now, and yet to earn my first bitcent from mining. Usually it craps out within 1-2 hours after boot, but I have had one good run of ~36 hours without the unit freezing up.

When it hashes, it performs as expected (100GH/s @ 1000MHz clock), I have unfortunately not been able to measure power draw, so I cannot comment on efficiency.

While I have had help from a number of people, I did raise a ticket with BA directly, and got a response back almost immediately that my request had been escalated, since then I have heard nothing from BA, so it would appear that customer care is not a priority neither before nor after delivery of the product.

Edit
Wanted to add, while my unit is the final version, but a running off a RPi, this unit is in no way a "plug-n-play" box. The web interface is pretty much useless. I had to update network settings, and pool management I handle exclusively through the cgminer.conf file.