There's that old saying, live by the gouge, die by the gouge. Actually, not sure that applies here but my bud at Republic was wrong, he thought the E-170 was going to be the offer (he knew someone who knew someone

) . Anyway, I was offered either the Q400 or E145 so took the 145. I'm a bit of a jet snob now...2200 of my 3000 hours was in turbo-props so I lean jet now. Anyway, this jet I know is tiny so I assume the cockpit is tiny.
Deeper cockpit than the Brasilia (what a difference a few inches can make). 6'5 and found it reasonably comfortable for an airplane that size.
Has a place for your flight kit, and cup holders.
Relay boxes are up front so you can hear stuff happening.
Not huge on performance (135 and, apparently, the 145XR have vaguely jet-like climb rates but the straight 145 is a little anemic).
Automatic anti-icing system. Works good, lasts long time.
Keep your knees close to the control column, especially when the other guy is doing a crosswind landing or churning butter.
In and dark, up and down on the overhead.
Turn the shed busses to override before single engine taxi at night, otherwise Captains will complain about the taxi light going out (seriously, Embraer...).
Make sure you get the gust lock (electromechanical one) fully disengaged before you go thundering down the runway, otherwise, you might have a bad time.
FADECs are cool.
Wear a headset. A good headset. Same windshield as the Bro, going a LOT faster.
Chimes too much.
Deselect ground power BEFORE the ramp yanks it. Speaking of the ramp, the mic to the tug operator is hot any time your wafer switch is in HOT. Watch what you say. ("See us next week again for
Stupid Stuff Pilots Say!")