I'm doing some home repair and discovered lever nuts. They look like a great improvement over wire nuts. Though they cost a bit more, ease of installation, tracking the wires, and less bulkiness make up for it, in my opinion.
However, some people are critical. A friend of mine, who is quite handy, says not to use lever nuts because they don't twist the wire for contact, which can create heat. I'm not sure I believe that.
What are the pros and cons of lever and wire nuts?