A few years ago I saw the 222 series being used on youtube and really liked them. I bought some from China on the assumption that they *were* fakes. They don't say WAGO on them anywhere and they don't show any approval logos. Comparing the internal structure of my connectors to the structure in the WAGO youtube video below, mine are fakes that probably wouldn't perform as well as the original under heavy current conditions. The copper colored piece seen below looks thinner in mine and it's some kind of tinned or plated metal rather than copper. But then, I'm not using them for mains wiring, I'm just looking for breadboard connections that are more stable than clipleads. I've been very pleased with their performance.
If you buy them, don't buy the 2-wire version. Buy the 3-wire version so that you can tap into a line. I didn't see any use for the 5-wire version, but then, they're cheap!
I noticed that the 222 series is rated for wires as small as 28 ga. while the 221 series is only rated down to 24 ga. You should decide if that's an issue for you.
Ed