Originally Posted by
elBulli
If you're referring to plug adapters, I prefer the block versus the whole kit. My REI adapter has seen years of abuse across the world and works great. Plus nice to have a USB plug on it in addition to the normal adapter. And if it ever fails, you could take it back to REI. However, I've put mine through so much I would just buy another one.
http://www.rei.com/product/837263/rei-usb-multi-nation-travel-adaptor-plug
How is using device powered by USB while plugged in? I have one of the supposedly well made adapters with integrated USB and it creates so much noise on the USB power line, that it actually interferes with touchscreen on several devices I've used with it.