She's going to be fantastic. Tonight may be the night she wins the election.
As others have noted, Hillary isn't always as energetic or electrifying speaker as some other Democrats, but I agree *IF* she can hit it out of the ballpark, it could well make a decisive impact in the trajectory of the Presidential Race with debates being the next definitive moment (Excepting dramatic domestic/international events, major gaffes, etc...).
Hoping that she pulls it out well tonight with final touches being made as we speak, and pulls out pocket Aces on this one.