Not a bad road, 2 45mph towns (Bahalia and one other), then Mt Victory is 25mph, Kenton is 25 in parts. Once you pick up 68 in Kenton, the road gets a little wider, Dunkirk slows you down a bit, but not bad.
Some truck traffic on 31, dont plan on going 60+ very much. If you are already in Marysville, go for it. Running 42 back to 23 is not going to net you anything, especially after all the lights and speed limits.