Soda Stream

About a week ago I noticed a new kitchen gadget on our counter, a SodaStream my roommate purchased.  I've read about them before from books and bloggers, but had never experienced it myself.  But I can officially say it's my favorite kitchen gadget and a must buy when I move out of my apartment.  The only recipe I've been trying lately is sparking lemonade (I use sugar and lemon juice from a bottle), but it is just as good or better than the store.  I'm hoping to try other recipes including grenadine, but my grocery store doesn't carry it.  Would you use it?  http://www.sodastreamusa.com/