Whoa - a few things to correct here:
1. Just because it's called "boba" does not mean you have to order it. I like the smoothie part (without milk) and order it as a smoothie. I love the tart plum flavor, and instead of tapioca balls (boba), I order lychee / pineapple jelly, which is much tastier imho.
2. I've never liked the junky smoothies like Jumba Juice, the "boba" style smoothies are far less filling and more refreshing. Jumba Juice smoothies feel like you're eating a meal, whereas a "boba" style smoothie is light and refreshing.
3. If you've never tried boba, ask for a sample of the tapioca balls. If you don't like it, no big deal, you will still love the smoothie part. I don't care for milk, so I get the smoothie (ice crush) without milk.