Hi there Linus~ Its unbelievably priced! I mean with such quality and at Central~ The scrambled eggs are cooked to be juicy yet well and served in much amount, they can cover the whole rice and I really like it.
The black things on the dish, do you mean those on scrambled eggs? They are probably some overcooked shallots.
And customers are flowing fast as they are serving fast! What's more is that the restaurant has actually two floors, which means there are quite numerous seats. The average waiting time is around 5-10 minutes, but do concern about the distance from your office for better time management!