If asking if Gridseed is, I would say yes, as I purchased 2 of them. And they work as promised. I have never used minereu, so can't say anything about them. I personally use http://www.gawminers.com/ and can say they ship out very quickly, and have a good reputation. For that price, I would almost suggest something like this. Since it will give you a bit more mining power for your money.
Yeah the KNC's are going to destroy everything, but my question is, how many are actually going to be sold?? I have no doubt that LTC difficulty is going to go through the roof, and will no longer be able to be mined by small/mid level miners, but there are enough different coins out there, that there more that likely won't be a few KNC's (or even 1) sitting on them. The profits are def not going to be there though in the short term, so I wouldn't be thinking of the miner paying for itself quickly (or possibly ever). So as others were saying, the safe bet is buying coin now and not mining them.
Thanks for the advice, would anyone advise buying litecoin or btc? Could litecoin skyrocket like btc did when the KNC's come out?