The weirdest part is how if you sip, you mostly get the Guinness but with monster carbonation seeping through.
But if you take a big gulp you'll get a bit of both and it assaults both the sweet and bitter ends of your taste buds.
I wouldn't call it a good drink but it is FOR SURE an interesting drink.

"your teeths enamel is so important for dental health! That's why I'm going to have this bored 23 year old woman scratch the fuck out of your teeth so they develop cavities later!"