Rockne Nicholas Ardoyno. Creditors call me Rockne. I go by Nick though. ;-)
I'm not sure how Instantcheckmate compares to other similar programs. There is probably a better value out there. I just haven't had a compelling reason to change or research other options. It has turned up good info that helped me locate several individuals so that I can make an offer on their properties. Also, it is useful to me to provide insight to help me profile an owner and possibly understand their motivation before I approach them with an offer. The things I find useful are age of the owner, criminal history, possible phone numbers, previous addresses, possible relatives and relations.
I'm unaware of any limitations. There might be. I have only run 5-10 names per month.