Except like most soft drinks nowadays it's full of sweeteners. Yuck. I can taste the difference between sweeteners and non-sweeteners pretty easily. Heck,, my girlfriend can smell the difference even with coke and diet coke!Nothing wrong with Schweppe
Ordering a g&t in a bar is a minefield because of this, it has to be Fever Tree or nothing unfortunately. (Unless they have some uber independent craft tonic etc)
Also a big fan of a stronger ratio. 2 parts mixer to 1 part gin is good,I think!