I've been here a few times and I still find it like a robotic chain form of eating. Express eating but slightly classier than food court eating. You pick your base dish (which I choose Beef Udon) and pick additional toppings and sides. The egg on top is a must and seems to be very popular.
Finish your meal, don't socialise too much and get out. There's a whole line of people after your seat :)
A good, cheap spot for express eating.
Prices: Less than 10 depending on how greedy you get on the toppings :)