Dave, I hope you are still watching this thread.
I've had one for about a month now. I love it.
What really sold me on it was the 3 built-in USB ports. So I can connect all of my MIDI controllers.
Being able to turn on phantom power for only two of the four inputs at a time is really nice.
Initially, it was a bit flaky, and tended to buzz a lot.
After stepping through various sample rates using WDM, I moved it back to ASIO, and it hasn't missed a beat since.
On my system, X3 is misreporting the round trip latency at 27ms. This would be very noticeable, but actual latency is imperceptible.
Note that I am running X3 on a Vista system. It works, but is probably not on its best behavior.
I wasn't sure what to expect from it, but I am actually pretty impressed with the EIE Pro.
The pre's are clean, and it offers more I/O flexibility than anything else I saw at it's price point.
It's not particularly compact, but seems well made.
All in all, it has exceeded my expectations, and I can recommend it in good faith.