After trying the Bibigo mini wontons from Costco, we tried some of these Bibigo steamed dumplings. According to the instructions, the only way you should cook them is using the microwave. The dumplings came in a little tray that gets microwaved for two minutes.
Like with the wontons, some spots on the dumplings were a little dry after microwaving, however, the steamed dumplings also came with a sauce. The taste of dumplings was very similar to Bibigo's wontons, just in a dumpling wrapper instead of a wonton one. It still had a Korean mandu taste with a dominant green onion flavor. Sometimes when you bite into one, water squirts out... so make sure you have a plate.. or at least a paper towel.
If you add the sauce, it adds a nice light, sweet flavor to it, which I liked. On their own, they were just OK, but the addition of the sauce definitely made these better for me.
Update (Nov. 2016): I had this rating at "good" intially, but the more I have these, the more tiring they get. I still have trays sitting in the freezer that are not seeming appealing to eat, so I'm lowering this rating to "ok".Food: Bibigo Steamed Dumplings, Chicken & Vegetable (Frozen)
Source: Costco, Tucson, AZ
Rating: OK (without added sauce)
Rating: OK~Good (with sauce)