Easy to use. And especially good the amount of gas that goes into the water. That is, it's not like some flat sodas I've had from time to time.
The only negative after almost 1 month of use is that the button sticks sometimes.

(08/07/24)
The 60 liters it claims to produce never come out. The bottle only produced a maximum of 20 liters. With three presses per use. Where the valve releases with the third press. Otherwise, if you put less, it will be like having a bottle open for a week without any fizz.
I will continue with the second bottle again with Philips and then I will try the blue one from SodaStream.
As a device, it is simple to operate, I consider it good value for money, but the bottle is small for me.
I don't know if the sodastream device actually produces the liters it claims, even though it takes the same type of bottle. I will continue to update

I bought it after extensive research, as a cheaper and higher quality alternative to the sodastream monopoly. Indeed, it is simple to operate (with controlled carbonation power) and very satisfactory for its price (67.63€). The package includes the depicted bottle, which is fine although not suitable for the dishwasher. ATTENTION: the cap comes embedded in a cardboard in the top layer of the contents, which I initially threw in the recycling... It also includes a CO2 bottle (ADD913/10), which can be refilled at refilling centers such as mysoda (while keeping the cap it came with). In case a second (backup) bottle is desired, note that it is compatible with most screw-in bottles from other brands (including the BLUE cylinder from sodastream).