I did a ton of market research to find a product that'd fit our needs, which were these:
1. could work with SodaStream canisters
2. Looked good
3. Made good, fizzy water (other vendors the "seltzer" is really flat
4. Works well as a kitchen sink for people who cook a lot
I wish I had added a fifth column, which would have been "how good is the customer service". I add the fifth one because we had some issues that came up and Donovan, the owner/inventor could not have been easier to work with, faster to respond, more generous or more gracious.
In short, we went with this product and are delighted. The other products we saw on the market were more expensive, or required us to drill holes in our under-sink cabinet b/c the product generated so much excess heat, or it was suggested that we pay a yearly $300 "service fee" for in-person checkups. When we tested the products out and were unimpressed, the saleswoman said "oh, were you expecting really fizzy water? this is more subtle than that". As if being flat were a feature, not a bug. Insane.
This product is small, easy to set up, does exactly what we need, and has great customer support.
One thing that we noted was the there is an error code that comes up fairly frequently that required me to turn the machine off for a minute and then turn it back on to reset. We solved this problem by putting a vacation timer on the outlet so the machine turns off for 15 minutes every night at 3am. That totally solved the issue.
Also just really happy to support a very smart and dedicated inventor and small business owner!