I visited here on Friday and had a scoop each of the durian and black sesame ice cream, each of which were some of the best I've had in New York City, just sweet enough, with deep flavor of the main ingredients and a creamy texture.
I love durian ice cream, but it's hard to find in NYC. (The only other place where I've found a good one is SkyIce Thai Sweet & Savory in Park Slope.) The black sesame was excellent as well, lots of sticky sesame texture and taste.
They also have a full range of standard flavors and homemade bubble teas, but I didn't try any of that. The store is on the garish side, with only two tables.
This place is far better than Chinatown Ice Cream Factory. I recommend making a trip out here. A good place to eat nearby is H858 Corp (59-24 8th Ave), a Fuzhou hand-pulled noodle shop that has a branch on E Broadway in Manhattan.
No. 1 Ice Cream
6410 8th Ave, Brooklyn, NY 11220
5924 8th Ave, Brooklyn, NY 11220