The one I received is either defective or does not function as described. I cannot return the item because I failed to keep the original packang (clearly my mistake) but some of the time it will not even register a signal between two NIC destinations (green LAN lights at the termination points) or when it does it only shows 100Mb not Gigabit (orange instead of green). I know that it isnt the cabling as the problem because i use it on both my server and HTPC and both transfer with the same cables at gigabit and show green instead of orange. when it was working (it isnt now), it was limiting my bandwidth well below gigabit for internal lan to lan file xfers. my situation may only be isolated to a bad unit but regardless i would not recommend this product.
Edit: This retailer just issued me a refund because he believed I may have received an unusually faulty item. I respect that and will now change my rating. Thanks for being an honest seller.