I bought these at a very cheap price and am very pleased. They do exactly as you would expect, with no problems. I have them connected to my SATAII harddrives. Works perfect. No probs. The only possible bad thing I could say, is that they come in a postage bag and thats it. There is no clamshell or plastic protective, but this is all better for the environment. Just buy it. Theres two aswell :)