Actually in my system, I found both Sean's and Twylie's assessments to be true in a way. It took me about 3 hours of auditioning to decide that what I was hearing, while obviously a distinct change, was an unequivocal improvement. At first, I was put off by the seemingly "etched" quality Sean mentions, and wondered if the more yang-ish sound I heard was less musical. All the improvements in separation and delineation Twylie talks about were there, too, but I kept changing my mind on whether the bass was just cleaner, or really leaner.
But over extended listening and critical comparisions of revealing disks with and without the DIP, I was brought around decisively, no doubt in part through some gradual readjustment on the part of my ears. The DIP removes a certain "soft" and less distinct aspect to the reproduction that my digital separates (see above), though much improved over the relatively "hazey" sound of my previous CDP, still apparently possessed to a residual degree. The resulting sound is unapologetically "digital" in character, but only in the best way, and definitely more accurate, IMHO. With the DIP taken out now, I think the sound is clearly less faithful to what I perceive as the mastertape, mostly through subtraction. It sounds compromised in timing, frequency extension, spatial recreation, dynamic expression, and transient cleanliness. What I'm describing superficially sounds (both literally and figuratively) more "analog" than what you get with the DIP in, but this is not really true. Analog, while it suffers from its own brands of distortions, does not share in kind the underlying mechanism of jitter (the reduction of which presumably accounts for the DIP's benefits), and so the softer sound of the rig sans DIP is not really "more analog", just reduced in fidelity.
Now I wouldn't give up the clean'n'clear, impactful, extended, very present, and spacious sound I get with the inexpensive DIP 24/96 inserted (via Cardas Lightnings on RCA). I think also think its amazingly well-built outside and especially inside for the asking price. (I hasten to add that I can't vouch for any of the many older versions of the DIP in all these regards, including appearance, which was not the same as the new chassis.) The DIP, along with my new-to-me (thanks to the 'Gon) Theta digital components, has finally provided me with digital sound to stir my emotions and keep my attention without fatigue, as well as actually compete with my turtable for playing time and inspire me to buy more CD's. I'm with Sam Tellig on this one - the Monarchy DIP is spot-on if you ask me.