MOS Burger (Closed)

i was so excited when mos burger opened one outlet in clementi but when i realised the store does not sell my favourite milk shake i was very disapppointed. i am not very sure is it the space limitation or business is so good that sometimes some of the dishes are not available which ticks me off. and i also think this outlet is severely under staff because even during peak hour they only open one or two counter and there will be a long queue waiting to order the food. but mos burger food are sti