First impressions? Well when I unpacked them I can't say I was super happy with the build quality. It is "ok" it will get the job done but its not the nicest. The packaging was excellent by the way. First I tried just the one with the custom build of cgminer and it just worked right out of the box, once I had set the correct comm port. To find this you just need to look it up in device manager.
Getting the second one to work took a little more effort. This was largely due to a lack of documentation but after a little searching on the web I found it was as simple as duplicating the comm port entry in the bat file.
Below is copy of my bat file, password etc removed:
cgminer.exe -o stratum+tcp://stratum.scryptguild.com:3333 -u Username_1234 -p xxxx --chips-count 6 --ltc-clk 328 -S //./COM4 -S //./COM5
I am surprised how good these work and I am getting about 2.7mh off a pair of them. That's around the same rate as my three r9 290x rig for about an 8th of the cost. Power consumption is also a fraction of what my old rig used which is good and along with the drop in power consumption there is a corresponding drop in heat output and thus noise as there are a lot less fans which are not having to work nearly as hard.
So when all is said and done I'm pleased, well I have ordered another four.