Back in Seoul, I had my own skepticism about how good a sandwich can be, but was swept away particularly by the said special sauce used on their sandwiches. That mind-blowing kick of goodness unfortunately did not happen when I took my first bite of this Ham Special (4.90). The sandwich felt rather bare, as the sauce failed to elevate the toast, the egg (with which I asked for no corn as I'd have done in Korea as I don't like it) was not as tasty and also felt a tad thinner. Even the bread just tasted so...normal and not well-buttered. The saving grace, however, was the cheese, which in this case somehow managed to draw the line between this and a very average sandwich.
I might revisit Isaac Toast Singapore again someday because I really want to try their Bulgalbi MVP again - which was amazing in Seoul yet extremely meh in Taipei - just for comparison's sake (and withdrawal symptoms from Seoul
...haha I kid), but perhaps only once their long queues start to ease up.