Received this product through the post, plugged it in and it worked great...
My new MacBook Pro was working and on a double display, giving me everything i needed for my media production! I was one happy customer!
I then came into work the next day, plugged the product into my MacBook and it didn't work... I tried playing with the cable, tried it on a projector and a different monitor and it worked on none of them! Complete waste of money and of my time!
Spend the extra and get the official Apple cable!