Let the hive mind of Engadget get that for you.
"I finally got a new laptop with a lone USB 3.0 port. I'm now looking at getting a USB 3.0 hub with a power adapter so I can use both of my USB 3.0 hard drives at faster speeds. I've read lots of horror stories where some hubs either don't come with power adapters -- and as a consequence the portable drives don't work with them properly -- or they are designed poorly which results in USB 2.0 speeds. Or, the hard drives keep getting disconnected. Do your readers have any suggestions or experience using USB 3.0 hubs? Thanks!"
This is actually a pretty cool device, though it is not designed for everyone. I just bought one for my grandfather at http://www.activeforever.com and it seems to be working for him. Granted, his hearing loss isn't severe, but it says on the site that this is designed for mild to moderate hearing loss. And contrary to popular belief, it doesn't look like some bluetooth headset when you wear it. It's actually barely noticeable when he wears it, other than the fact that I don't have to shout at him anymore.