This has rendered the original lead obsolete, well for me anyway. I can use my iPad when I'm sitting away from the plug. It's handy, if like me you use your iPad but then forget to charge it. For the price of the cable I'd recommend getting one, you can also charge other 30 pin iDevices with it. I'm glad I bought one!!!
Bought two of these for our house phone as the others weren't holding their charge anymore. They're better quality that the ones they replaced and now when using the phone we're not worried about it switching off.