I just bought the one you're referring to and I also hate owning appliances. Ultimately I got it because buying and carrying a 2 liter of sparkling water every day is a huge pain and wasteful. And you can go buy a 20lb tank of co2 and an adapter and not have to spend $30 on the overpriced dinky co2 containers

I don't need sparkling water but I definitely drink a lot more when I have it and more water also means it's easier to not gain weight