It's ridiculously hard to find a specific store here but if you're down to explore, you won't be disappointed. They have pretty much everything you need, all in one place and sometimes you can barter.
Today I came to get some custom t-shirts at Unique Outfit at the back of the food court. Tshirts were $5 plus $8 for printing and you can get a better deal if you buy bulk and they will screen print for you.
I had some great Korean food for $10 (tax included). Burlgogi, rice, noodles, salad, kimchi and tea. How amazing is that?? Of course I left with some boba (mango with tapioca). Delish!
Minus one star because not all the entrances are handicap accessible. the directory isn't up to date (prbly due to stores changing often). Also, there used to be more authentic Oriental things like a photo booth section (like the ones you'd find in Hong Kong or Korea) but I couldn't find any this time :( boo