Dependable. Works for years now.

I tested the CH551 and the CH552. Both are great little boards.
http://nerdralph.blogspot.com/2020/07/getting-started-with-wch-ch551-and-ch552.html
I think the CH552/554 board could do without the 3V3 regulator, since the chips have a builtin 3v3 LDO.

Great little boards for learning the CH55x chips (and 8052 programming in general). You can do a lot with the 10kB (actually 12kB in my testing) of flash available on the CH551. Electrodragon has documented these boards well.
http://nerdralph.blogspot.com/2020/07/getting-started-with-wch-ch551-and-ch552.html