Saying this is definitely a colloquialism. The author means it's worth a look, it's worth doing, it's worth trying, but usually qualified by not being of the highest quality, or not having accomplished all it promises. Normally, you would associate this with something like zip-lining, bungee-jumping, wilderness touring, something that not everybody would be suited for or interested in. Therefore, it's a mild recommendation that if it's not your thing, you might still like it.

Thanks, Ferris. I'm glad my comment helped you. :)

Hey Evelyn. I really appreciated your help even if I couldn't mark you ad the best answer. I have done it for Michael. Anyway, Thanks.

I agree with Michael. Just to add: this is also something people can say when they don't want to openly say they didn't like something they've done. "Yeah, I tried water-skiing once. It's... definitely an experience."