Just got mine today. The clamshell case came loose, and the packaging looks cheap. The company is clearly just starting up. Their logo is some crappy default font. However, the IEMs themselves sound GREAT. The soundstage is pretty amazing for an IEM of this price. The bass is very weighty, a bit more than I like, but a perfectly fun phone. Honestly, this is probably one of the best $20 I've spent on audio. One thing I don't like is the cloth cable. Cloth cables tend to tangle like a mother, and this one is no different, but for $20 bucks, I can't really complain.
I don't know how the CC51 sounds, but these sound pretty similar to how Joker describes them in his review, and I'm not even done burning them in yet. If these are the same OEM as the CC51, I can't see a reason why everyone shouldn't have one of these. They're only $20 - $23 with shipping.