I have a 5k iMac. Bought an Anker 9-port USB 3.0 hub a while back. The problem I'm having is that most of the devices I want to plug into the hub don't seem to play nicely with it. This includes a ScanSnap scanner, Epson R3000 printer, Wacom tablet, a Compact Flash card reader, and an RME BabyFace audio interface. I've talked with the manufacturers of most of these devices, and they say they are best plugged directly into the computer. But of course that's impossible when you only have three USB ports! So at this point I'm stuck with manually unplugging/plugging things in, which gets old after a while. I'm hoping maybe it's my particular hub, so that's why I'm posting here. But from what the manufacturers say, it's more of a problem with hubs in general. What has your experience been?