Pretty solid selection of Asian groceries. It's pricier than the other Asian grocery stores in the area, but is also a little more organized and therefore easier to navigate for non-Chinese speakers (because yes, most of the employees are Chinese).
The produce section is pretty fresh, depending on what fruit/vegetables you're looking to get, and they also have a bigger selection of pastries than Asia Town Center and Tink Holl. (I would still go to Koko though if possible.) Their selection of spices, sauces and seasonings will take you around the continent of Asia several times over - I've found everything I need to satisfy the recipes I use, and usually in the brands that I'm accustomed to. My friend says that the meat at Asia Town Center is fresher, but you can decide for yourself.
Park to Shop always seems to be busier than the other groceries as well, probably due to the fact that it's in the same plaza as Li Wah and dim sum + grocery shopping seems to be a ritual. This also means they have more staff on hand and in general they're pretty efficient. However, you can still expect a wait and might have to be assertive at the meat counter so as not to be cut in line by someone else. Sometimes vendors will be selling things outside on special occasions (like roasted chestnuts on Chinese New Year), so be sure to take advantage of that!