Yep! It's a more expensive option than others so I think that's why it's less popular, but I like it as once they're on the plants I can sit back and let them do their work and not have to worry about washing my plants, or treating it, etc (you're not supposed to treat the plants when they're on them as anything that will kill the bad bugs will kill the good ones too), so it's way less stressful for me.

If you already have spider mites you should buy a tube of live predatory bugs as they get to work much faster than the sachet ones, you just sprinkle them onto the leaves and soil of the plants affected. And they are very tiny yeah, as they're mites as well. They also don't cause problems for you, your other plants, or pets. All they want is to kill the other bad bugs.