Yummy and delicious ice cream! Had the Toroto (purple yam and coconut) ice cream sammie with ginger cookies. I will say though, it's $7 for a full ice cream sandwich -- although filling, I did find it a bit expensive for what it was, so it's not a place that I will come back very often.
Is it worth the half hour (minimum) wait? This depends. If you're just looking to get ice cream then no. If you want their ice cream HK egg waffles and/or ice cream sammies then yes!
Just like everyone said, dress accordingly for the weather and the wait can be super long (there's only two people working in the front). A small bench is also available for seating inside but don't count on getting a spot there.