You’ve clearly never had it. You neck it immediately, it’s an espresso shot, but instantly cooled by flowing over an ice cube. It’s not watered down any significant amount, you don’t wait for the ice cube to melt, you’re missing how much latent energy there is in the change between frozen and liquid in ice. There’s plenty to cool a small shot without melting the whole thing. It keeps the sweetness and even most of the texture of the original shot, it’s just not hot, it’s worth trying