Do BitFury rigs overclock well? Is it reasonable to expect 500 GH? Are they reliable? I read a good number of horror stories on this thread from folks who had a lot of trouble getting all 16 boards to work correctly due to board wobble and poor connections. Does the SD card still get corrupted when the machine is powered off?
Yes, yes (510-515), and yes.
To prevent wobble order a really nice case from spotswood:
https://bitcointalk.org/index.php?topic=267713.0The newer kits have the v3 m-board with newer chain miner software, which includes a proper shutdown button on the web interface. Otherwise ssh into the device and issue a 'sudo halt' to cleanly shutdown the RPi. No corruption.