Out of the million bubble tea vendors in pmall, this is one of the better bubble tea places. They have more variety and more "customizable" options. You can choose your level of sweetness, can have the drink hot or cold along with the standard options (jelly or bubbles etc).
Like a lot of vendors in there, there's always a bit of a line up and the prices are quite pricey, more so than its competitors in there (all bubble tea places in there are already quite expensive I find). I actually find their wait times longer than their competitors, or even their other locations.
They do collect points so if you don't have a points card yet, best to sign up at the cashier. If you forget to bring your card, you can give them your phone number to collect the points.
If you're in pmall and am looking for a decent bubble tea place, probably try Presotea instead (they have buy 1 get 1 free promos). This place is great but given the wait times and the prices, you do have better options.