@cjack, like you I was apprehensive. How could tiny little levers hold wires securely? Do they really accept the smaller gauge wires well?
I can say after using them, they were an absolute upgrade to the wire nuts I had been using prior. They are a good compliment to terminal bus bars. Any new wiring on my layout as well as any disturbed wiring gets the wago lever nuts.
It's one of those things that once you actually have hands-on experience with them you'll wonder why you ever doubted.