I've been eating this for 15 years, since I was a child. I am a hokkien mee fanatic and I try hokkien mee everywhere I go. This is the best. It's also known as Lorong 29 Hokkien Mee. All taxi drivers know it.
The noodles are slowly fried in pork lard, prawn stock and sotong stock. There are no short-cuts for this. Each batch takes about 25 minutes to cook, and a long line usually starts forming from 6pm. The slow cooking process means that the noodles are soft and have fully absorbed the flavour from the stock.
This dish is not for the faint of heart. It is oily and rich and decadent, a big gloopy mess, but it's very very good. You can eat it there or order it to go. I personally find that when I order takeaway, it gives the noodles a chance to sit longer in its own oily glory, and this makes it taste even better by the time I get home.
If you're a tourist and you only have time for one meal, make sure it's here.