Quite a good cheese tart and rather light. You can eat about a third of this in a sitting and not feel too stuffed. I will say though, it's definitely more egg-y and it has the consistency and texture of a tart and not a cheesecake. I think many people mistake this be like a traditional cheesecake, but as the name suggests, it's a tart. They pour a layer on top of the original flavored tart and it becomes a semi-jello layer that is tart/sour, which is a nice balance of flavours from the rest of the filling. Lines are extremely long (especially at night and on weekends), so I'd recommend maybe waiting until the lines calm down a bit or come during the day when the lines are a little less crazy.
Staff there don't seem to be too fluent in English, so you'll need to be clear with your instructions and any questions about the menu. When I went, you could pick up an original flavored tart immediately, but the green tea and chocolate ones required a 15-20 minute wait. Drinks / other sweets also took a much longer wait time. Overall, a pretty yummy tart, not worth that long of a wait though.