Tea Guys Amsterdam for bubble tea is even visited from The Hague; they seem to be known to have very nice flavors. For this reason, you can guess that there might be a line, and it shows. Many reviews on Google indicate this.
Also, reviews indicate that friend groups even search cities for addresses To taste bubble tea. After tasting three different bubble teas, all three were found to be delicious.
There's no arguing about the service either. The employees there seem to be fun and nice with great service.