I've got a plain older countertop device with mini CO2 cartridges (with a cheap exchange program) for now. I am redoing my living room and study soon and will get a kegarator soon so I have it on tap.

I don't need the flavors infused. But if I'm feeling fancy I'll add a slice of lime or lemon, or both (usually when I need to use the rest of one after making dinner). Although it is my understanding this is certainly possible, adding flavours/syrups or what not.