Is instant checkmate any good?

Instant Checkmate has an excellent rating with the Better Business Bureau, an A+ to be exact. The reviews regarding the interface and the available information are pretty standard for a site such as this one.

Is Instant Checkmate free and safe?

No, Instant Checkmate is not a free background check service. However, if you want to try it before you buy it, it offers a five day trial period for just $1, which can be technically considered free.