I got a soda stream for Xmas and it has replaced my seltzer buying. I got the basic model one that came with an extra tank so it’s gonna be a little bit before I NEED to swap out. No clue yet what the exchange pricing is, but I know target does exchanges. I’ve been using the bubly variety pack of flavors and I’ve really been enjoying it. Super easy to use, and the bottles can go in the dishwasher. I tried one of their own brand of “zero sugar” Dr. P soda and it was decent, but I’ve been trying to stay away from soda in general so it’s a once in a while thing. Overall I’ve been pleased because I was buying a LOT of canned seltzers, so I’m hoping the exchange cost isn’t bad. I use it multiple times a day as well.