If you're having problems with them, they your hole is incorrect, or you're running 5000+ watts of power with the incorrect size hole and no glue.
They work. Never had a problem. With the correct size hole saw, a little gorilla glue, and bam. Never had a problem.
Why get all upset about it? I'm trying to do something nice for people, some don't have the extra $2 to spend. I've had people who were $5 from being able to afford shipping, and had to say NO. Every little dollar adds up. But that's not an issue here, because these work.
If it bothers you THAT much, order some for me. Maybe you'll sleep better tonight?