http://hashra.com/support/
And don't try to mine SHA with them... strictly for Scrypt.
I wouldn't say that,low power consumption is their strongpoint
https://bitcointalksearch.org/topic/--7216
They require a lot of cables & can take up abit of space,but still are viable
I might get a bunch of them again....if the price is right
I used CGminer,I think 3.7.1 & it was stable,just had to plug em in one at a time after starting CGminer
With bartle fork you just compile and go...no plugging steps needed. Overall hashra image for the Pi is my favorite though...so simple and stable.