Does anybody have any experience with USB power outlets?

[Chekhonte]

I've been thinking about installing some USB power outlets in my house. With devices that USB wall chargers I've had mixed results. Some of my phones will only charge with a wall-wart that came with it for some reason. I'm a little worried that I'll have the same problem with USB outlets. Do any of you early adapter geeks have any experience with these. For those that haven't heard of them here's an example:

TruePower UCS Power Outlet With Built in USB Ports - TruePower UCS Power Outlet With Built in USB Ports