Any brother using Vaio SZ laptop???

Hi, i just bought a Vaio SZ28 yesterday, but i found out that the AC adapter is far too big and i'm trying to find a replacement adapter. The only one i can find is Kensington 70W Notebook AC Power Adapter (http://uk.kensington.com/html/7875.html)

Q:

1. Does it work?
2. Is there any other alternatives?

Thank you very much!