My 3 X-1's showed up Tuesday from Minersource. I initially had issues with 2 of them, all arrived with firmware 1.0 after upgrading to 1.4 (newest at the time ) they settled down for the most part. I'm think the thermal paste may of not cared for the shipping as they were overheating. One of the units does randomly reboot without any signs that its overheating and has a higher percentage of errors but I'm letting it run for another night before I see what the wait time is on a replacement. The instructions listed on Minersource are incorrect as they now are setup to run off of DHCP so the 192.168.0.180 IP is incorrect for the current shipping units. Checking your DHCP table on the router is the best way to do this to my knowledge look for new "android-xxxxxxxxxxxxxxxxxxxxx" devices or do an "arp -a" at a command promt and all of my BA devices MAC address start with ba-ac-08-44. As mentioned before you do have to individual select each unit to update the firmware....in my case I had to log into each IP and update it for what ever reason. It would be a nicely crafted unit unlike the BFL single heat sink hack jobs....but without the LCD or some type of cover for the hole its glares out unfinished but at this point that is a mute point. They are also very quiet units.
Well that's my 2 cents.