I paid for a voice polygraph, are results legit?

I took it with a BBB accredited co. I went through some grueling questions, was asked one question 5 different ways abiout 30 times. In between they ask irrelevant questions like what is your fav. color & you relax, then they hit you with did you do such & such? I read that negative things about it, mainly from people against things that they consider invasive on privacy. Police, insurance companies, FBI, CIA use it. Would my result be legitimate, able to be used as evidence of innocence. Many courts don't accept them based on invasion of privacy but many do.