I've been using soda stream since it came out and now I think I'm going to make the switch to this brand a permanent thing. My only negatives on this unit are that the outer shell feels a little cheaper than I'd like(it actually flexes) and the carbonator is separate from the main unit. The carbonator screws on to the top of the bottle and them you press the main stem of the unit into the carbonator. As far as how well it works, I've gotten way more carbon into the water with this unit than any other I've tried. I press down a lot less than I did with the Soda Stream. My first attempt I had to wait some time for the carbonation to settle. I have not seen extra bottles on Walmart yet and will buy a few more when available. Also, works with Soda Stream tanks.TLDR : Works great, would pay more for a metal or harder plastic version.
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