Have You Tried A ‘Sodastream?’

We've been seeing and hearing alot about this new thing quite a bit here recently and the more I hear about it, the more I want one...

Have you heard about or do you HAVE a 'Sodastream?' You're supposed to be able to make any flavor carbonated soda from home. Many went crazy for the Keurig coffee maker and I know of several people who are doing the same for the Sodastream. I would love to have one to see if it tastes just like soda and because it looks very easy to make! Do you own a Sodastream and if so, is it as convenient to use as it looks and does it taste like a regular soda?