Sadly its the thinking some of it came from slave/child labor in China that is the turn off. I know my electric bike hubs made in Germany last forever. But a Chinese controller blows if you fart too close from the heat
LOL, look inside the detectors you currently own, what'cha see?
I'll try anything. Thought about it.....Some have tried the ones you mentioned, they did work and find stuff. they just don't have the professional look, looks aren't everything, its what inside that counts.