Most of those look exactly the same because they're actually all made by the same manufacturer. I have one that I bought years ago and it works great, I love it.
I'd be careful man, those things have a will to stay alive. They've evolved to prevent being able to turn them off, I'd be scared of some Maximum Overdrive happening haha
so been wondering, with all these tests, what you do after the test, i mean like the food ingredients you used to test the tools? you cook it for dinner or something?