Located inside Tai Thong,You can order the $5,$6 or $10 portion. There are options to pair other pork products with the prawn noodles, including pig stomach! For me, the soup was overly sweet. I feel a good prawn soup broth should taste of the umami richness of prawn and pork bones. Noodles had right amount of chilli and oil, which compensated for it. For Soup lovers out there, it is $1 per refill.
Overall it is worth a try, although there are better options out there, like Ah Hua prawn noodles at Balestier!