The question has been posed before, and there is no UL certification. But I still keep a few of these around the house for relatively lightweight use. After having disassembled a few, and done some simple comparisons with a few name brands whose power strips look far less capable, I don’t mind using these for some a few things.
I tend to use APC, Tripp, or other reputable brands for the higher draw or more critical items (several of which are on a UPS anyway). But that’s just my IT background getting the better of me - And my wallet.
Hope that helps.