Are people search engines reliable?

I used Spokeo a very long time ago to look someone up. I’m considering using it again because now I have my own money and can afford to sustain a subscription. I’m looking deeper into reviews and realized that I’m actually not sure how reliable people search engines are.
What are the best ones? Worst ones?

People seem to have complained about Spokeo not being accurate or updated. Meanwhile every time I Google a list for the best people search engines I seem to run into questionable, worthless lists. I was hoping to find something like a Ranker site or something where actual users ranked them.