I just finished my first trip on one of these (MSP->DFW). Was assigned seat 13D (Exit row) and sat down there. The legroom was excellent, but the seat itself was incredibly uncomfortable (Granted, not as bad as a CRJ200) the headrest was a nice touch though.

Just before boarding was done, the gate agent asked me if I wanted to move to F ,and I got 4C up there. Much more comfortable seat (though less leg room than my exit row seat), but not as comfortable as the other F seats in the NWA fleet. The recline function was nice, pushing the cushion forward, it made it a lot more comfortable.

Overall, its a nice step up from a CRJ200, but I'll still take the trusty DC9 for comfort if I have choice .