The white pepper on the shrimpwan tans will stay with you for a while, but you should still order them. And the soup dumplings, for a really good time.
The shengjianbao are fried pockets of glory (but watch out they squirt everywhere). The prawn wontons are amazing even if you're afraid of spice. Both are slightly pricey for how many you get.
The dan dan noodles are quite tasty. However, I find the baos quite dry inside and the lamb belt noodles were extremely oily. The wait times here can be very long as well.