Just responded to a question like this in another forum. I bought it and I love it. Its a step up from the pre's in my 002r, it has a few cool toys on it, compression, eq, "tube" saturation. The compression is lacking a bit but its not bad, the eq's are ok, pretty much what I expected, the saturation knob does color things a bit. The whole pre is pretty colorful adds a lot to my baby bottle. I'm considering buying a second one.
Before you get the Eureka, I suggest you look into the Focusrite Octopre LE, it sells for $499 at 8thstreet.com, AND comes with a FREE Studio Projects C1