Trying to mine with these on a pool that only accepts higher difficulty shares is an exercise in frustration. You pretty much have to mine on a pool that has lower difficulty stratums to choose from, or vardiff. Higher difficulty pools means your Gridseed miners won't get shares accepted as often and if any of the 10 you have connected to a controller takes too long, it'll reset and start all of them over.

It was my understanding that they were going to be releasing an updated firmware to correct this problem, but I have yet to see anything. It's getting pretty frustrating.