Like a bottle of barbed wire . . .
I have a pretty tough stomach when it comes to sports drink and have tried almost everything on the market. I love GUs for short distances and Perpetuem for longer runs and ultras. While I don't find the taste awful, it has upset my stomach EVERY time I have tried it. Xylitol (a sugar alcohol) with a well established history of causing GI upset and GAS is an interesting choice in sweeteners. Alas, it all comes down to what works well for YOU! Give a couple sample size packs a try, you may love or hate it. Whatevahs!