I purchased two of these hubs a month ago and they have worked well. The only problem I strike now and again is when the 13" PowerBook Pro wakes up from sleep mode, the wired Apple extended keyboard isn't always operative. I just unplug it from the hub and plug it in again and all is well. More likely to be a keyboard issue as it was temperamental previously when just plugged into the PowerBook and sometimes wouldn't respond at all. In all, these are good little units for expanding a network of USB A peripherals.