I've read some reviews on it, and a lot of people say that it isn't all that easy to find the cartridges. I wouldn't know, since I don't have one. And it seems to me, that unless you're addicted to sodas, that it isn't all that economical, as the ads claim. It sure wouldn't pay for itself in this house - I buy one 8 pack of Pepsi per month, and that lasts me all month! We're juice and Crystal Light drinkers here!