taiwan's best taco no.2

gindaco in Taipei's Ximending (西門町) district has three flavors:

original, green onion and egg with japanese sweet sauce

they are a little pricey as advertised: NT$110/120 for 6

but they also have a NT$140/160 for 10 deal, which is better though you cannot mix flavors

take the mayonnaise offered, and this is probably the best taco so far
(or do you know better?)