Bibab Express is conveniently located at the food court near my office so I go there religiously for lunch!
I usually get the beef bibimbap with purple rice ($10) and choose from their assorted sides such as shiitaki, spinach, carrots, cucumbers etc. - you can choose as many sides as you want). You also have the option of getting a flower-shaped sunny side up egg which I find very cute! Miso soup comes with the meal as well. I always overestimate my tolerance for hot sauce so it's nice that they have a water machine nearby so I can put out the spiciness in my mouth!
The quality of the beef is a bit inconsistent. Sometimes they are cooked too well and they end up being very dry. Overall, I think the price is reasonable for the quality Bibab Express has to offer.