I use this on my MacBook so I can connect several items at the same time including a USB keyboard and optical mouse, my iPad and iPhone, a webcam, an external hard drive and even a light o Rama controller for my Christmas lights. This thing works great and provides plenty of power for all devices. I haven't seen any slowness in my webcam, iPad/iPhone syncing or even copying large movies to my external hard drive. This guy works great and I am not at all disappointed in performance. I am however a bit disappointed in the design. This has to sit on the corner of my desk and i need plenty of room on both sides to allow the USB cables to plug in. I would have had them design it like a tower with the plugs all on the back one on top of another. That being said, the current design does offer some added stability to keep the hub from falling over. Overall a great performer and a decent design.