DISCLAIMER: My shop pimps the Euphonix "Artist" controllers (though we certainly don't make any money on them, hah). On the other hand, we also run a studio here that uses one MC Mix, one MC Control, and one Transport.
The system is very, very cool. We have ethernet tielines in every room that hit our router, and can roll the machine from anywhere in the building and have even built "mini control rooms" around the shop for recording when someone else is mixing in the main CR.
We started with the MC Control, which was probably the best way to go. This unit makes it MUCH EASIER to control all functions of the software via the touch screen, whereas the 8-fader unit is really just faders. You can do plugin controls on the MC Mix as well but it's kind of a pain in the neck to get anything on the inserts. We added the MC Mix when we started mixing in the computer more and didn't want to bank around as much. Then we added the Transport for the sole purpose of being able to run the deck from anywhere in the building or to simply have a transport and jog wheel if we've got the MC Control somewhere else in the shop.
They're small, light, and can get out of the way in a hurry if you need it to.
Only pain is the line-lump PSU's. We deal. Whatever.
These surfaces are 100% adaptive to the software you have at attention and the whole thing is 100% customizable. If you don't like how it maps anything out, you can change it in the EuCon software.
Note that with Pro Tools, it will convert the EuCon to HUI as Pro Tools does not talk to EuCon. It's pretty much the only DAW that won't open up to the platform. It still works very well with Pro Tools, better than a Mackie control or similar, you just don't get the full resolution that ethernet/EuCon offers.