Anyone using sender score?

Hey everyone,

Is anyone using the free Senderscore.org from Validity to manage and keep track of their deliver-ability?

I noticed today that I cant seem to get it to work...looks like they did a redesign and the site says I've done too many lookups for my account...which it's the first time I've checked in probably 2 weeks.

Is anyone who uses this experiencing the same issues here? I'm trying to determine if it's a temporary hiccup or is intended.