is that it is big in Europe and derives significant revenue there. With Europe very unstable and some countries over there in recession, and with downward pressure on Euro, this may be an issue for Sodastream in short term.
In long term, I think this company has staying power, should start to generate significant cash flow, and looks like a winner. I don't think it's a fad. It's "green" and saves consumers money, and has expanded its offerings.
While it won't be displacing Coke or Pepsi anytime soon, it still has lots of growth ahead of it... just one opinion