Jake came on at 8:00 and was done at 9:15. The length of the concert wasn't so great. Easy in/out and a beer stand nearby so we didn't have to miss any of the show. If I chose seats I'd probably get row 5 at the lowest. The seats are low and it may be a little hard to see over the people standing up.
Actually the first 2-3 rows behind the general admission standing room area may not be as ideal as you'd think. The concert area is pretty small which means there really isn't a bad seat in the house. My wife and I drove down from Guthrie for the Jake Owen concert.