This is truly not meant to be mean or sarcastic, but speaking from experience (and that means attempting to help well-meaning, but unsuspecting folks that fell for those things)...
A graph of that quality is worse than not having a graph at all. Seriously, save your money and look for a 2-space dual-channel DBX, Rane, or Ashly EQ on Ebay or Craigslist. Ashly Proteas are going for VERY cheap these days. DOD and other El Cheapo units sound awful and do funny things that a half-decent EQ won't do.
Just my (20 years regional PA experience) opinion...