Ignore those things, they have exposed terminals and are NOT user friendly. I don't know why they're being discussed for an introductory consumer device.
Exposed terminals - shock horror - and why the shouting ?
You should lie low after having recommended duff 12V supplies. We're talking reliability here.
1) Yes, exposed terminals on a
beginner's device is not a good idea - that should be obvious.
2) What do you mean shouting?
3) What 'duff' 12V supplies? You mean the ones on Amazon, that sell 100s a month and have a 4+ star rating?
I agree on exposed terminals - bad idea for beginners. I really like the Rock Miner 100GH unit, but it needing a computer PSU sort of makes it border line beginner friendly in my opinion. If AM could make something that uses a power brick and had a built in controller similar in size to the RM device...that would be the perfect unit for newbies! Or make it USB based to keep prices down, and have a simple GUI for cgminer/bfgminer included on a disc.