This is a very good, and acceptable, recreation of Mt Dew, but is not the exact flavor, neither of the old sugar sweetened nor the newer corn syrup sweetened one. The reason for this is that it contains some artificial sweetener to, I assume, make mixing easier as the pure sugar or corn syrup versions would be too thick to mix well given the SodaStream system. I appreciate the lower calorie count it provides, but the taste is different from the original. This is likely why the Diet and Zero versions taste more "Authentic" since they're already based on artificial sweeteners.
No matter how I mix it, it tastes terrible and flat. I’ve tried different water and more carbonation and more syrup and less syrup - nothing works to make this not taste terrible.
Ok this gets the job done. I think Pepsi tastes more like Pepsi if that makes sense. This MTN Dew is good and will get the job done when you craving the dew however it almost has a diet or off brand taste to it which isn’t a dealbreaker or anything for me. I will say soda streams brand version of the mtn dew is better imo.