Hi,
Where I work, we get these Do328JET's aircraft on delivery, seen about 30 of them now to USA mostly for ACJet in Delta colours.
The pilots love them and watching them take-off is like a learjet they are really fast and much faster in the cruise, one thing they did say is it burns up to 60% more fuel than the prop version but makes up for it in the fact that it has larger fuel tanks.
I like the cockpit, is really roomy with all glass and some of them even have HUD fitted in the LH seat for really bad weather, all round really smart aircraft, think we will see a lot of them very soon but I dont think they will be as popular as the Embraer 135/145.