I had a chance to play with it a bit at Perfect Circuit a few weeks ago.
I was quite looking forward to it in hopes of finding a module that produced something like a more natural reverb than the Erbe-Verb.
It does that.
As DMR pointed out, the MN module has more control options, and thus lends itself a bit more to use as an instrument, and even sound source. I don't actually think it sounds amazingly good as a 'natural' reverb, but that's entirely not the point of it I think.
The EOS functions better as something approaching a 'natural' reverb; more an effect than a sound source or instrument, which isn't to say you can't do some of that with it too, but that's not its strength.
As I may have conveyed in this thread earlier, I have fairly strong feelings about reverb (and its abuse, by legions of people), and the EOS is precisely the kind of device that will have people giggling deliriously in to the farthest reaches of space as their reverb tails spin off in to oblivion, measured roughly in geologic time spans.
That's not for me.
Its plates and shorter sounds are very nice, but I wanted so much more of that, and other types of 'realistic' spaces, rooms, ambiences, etc., and it just doesn't have those. For the HP and price, it's not worth it to me, but for others, who might have different needs, it could be the new benchmark in Euro reverbs.
As far as I go, I ended up buying a very inexpensive 3hp Erica Pico, with the FV-1 chip, and while it's very limited, it does enough for quick, simple, unobtrusive delay and basic reverb effect, and sounds surprisingly good; better even than the Black Hole DSP module.
However, since I've descended in to my own personal black hole of DIY, I'm building a Dervish soon; already have all the bits. It uses the same chip, but algorithms can be custom programmed, works in stereo, has sync, takes up slightly less space than the EOS, and is way, WAY less expensive.
Anyway, don't let anything I've said dissuade you from checking out the EOS, or any of the other ones. This is intensely subjective stuff.
Yikes. Reverb TMI. Sorry.