A friend of mine had the DILA NR for his G-15 and after a couple of hours of playing with it (I was helping him set up his theater) I threw up my hands and told him to send it back.
He bought a Rock+ and he's been very happy with it (as am I).
Honestly, I was pretty unimpressed with the NR. It does a good job of de-interlacing video (as does the Rock - just not *quite* as good), and the box itself looks nice, but in all other respects, I was extremely disappointed with it.
It's extremely limited in aspect ratio adjustments, you can't change the refresh rate or resolution (what happens when you get an anamorphic lens?), the onscreen menu is pathetic (and SLOW!), few test patterns, nothing to help in adjusting DILA tracking/phase, etc. etc. I still can't get over the fact that when in letterbox mode, the NR CUTS off it's own onscreen menu display!
I expected to be mildly impressed with the NR when my friend bought the unit, but well, you could say I was surprised.