Well, PremiumDomains.com use automated software.

The same software is used by DomainScore.com also.

While PremiumDomains.com will take 2-3 Days for evaluating your domain, DomainScore.com will give you the results instantly.

The output (domain score) what you will be getting from both the sites are same.

Try your domains with this one and see the scores.

DomainScore

But these are useful tools to give you an idea about the domains you hold.