This is the only banana flavored whey I've ever had, I mixed with 6-6.5oz of water and I didn't notice any chemical taste. I haven't had anything from Syntha before, just ATW (cinnamon bun isolate, banana isolate, egg nog isolate, cupcake batter blend) and Optimum Nutrition (vanilla which sucked, and double rich chocolate which was ok). ATW protein is much more palatable for me than ON. I liked the cinnamon bun isolate, but got tired of it... banana I never got tired of drinking.
If worried about the taste of the ATW protein powder, they sell sample packs on their site... it's how I tried banana for the first time and fell in love with it.