Favorite seltzer maker?

I carbonate with a 5Lb CO2 Cylinder with a regulator and some hose fittings available from homebrew supply stores. It's a bit DIY but significantly more cost effective than countertop seltzer appliances--especially for large quantities. I have a specialty 2.5 gallon keg that I use to hold the seltzer, but there are many options including reusable 1 liter bottles.

We love our Soda Stream as well. Wouldn't trade it for anything!

We have a Soda Stream and it makes perfect sparkling water.
Haven't tried other brands so can't compare it.
BB💐