I've been going to Ping Pong regularly for about 6 years. My order is always the same, with a couple of different additions each time. In fact, I go so much that my friends just tell me to order whatever is good... I see it as a positive that they trust me, however secretly I think it's probably because they think I go too much!
Beer and wine is good, Tsingtao is always a winner - I love dim sum, although when I first started eating it, we had it for breakfast rather than lunch or supper so beer wasn't really present!
My favourites are the char sui buns, the roast pork puffs, the prawn toast, the crispy prawn balls, all of the steamed dumplings are delish. I don't think there is anything on the menu that I wouldn't try.
My only criticism is that the food comes when it comes, even if you ordered half the menu it can all arrive at once. I have once had my whole meal delivered before our drinks turned up... Not ideal. I would recommend that as you're placing you're order, talk to your server and discuss that you might not want everything to arrive at once and maybe they could put half of it through first and come back and do the second half slightly later. Then you don't run the risk of cold rubbery dim sum when you're finishing you meal!
The staff are always eager to help and nothing is too much trouble. Sometimes getting their attention can be difficult, but adopting the air traffic controller pose often helps! Overall, it's definitely worth a visit (or 1000 visits if you're me).