We are flying in early April on a non-stop flight, and the 1st few rows of our plane (both ways) are configured with 2 wider seats on one side, and 1 seat by itself in the row on the other side. So the diagram shows that when you enter the plane, once you are past these first few rows, the aisle jogs over. The rest of the plane has 2 seats on each side. The seats in the front are wider and also have more leg room. When I first booked our flight in mid-January, these Signature seats where $50 each. A few weeks ago I noticed that the price had dropped to $25 each, and I believe they are now called Stretch seats. Not all of the Midwest flights offer this seating.
These non-stop flights with Midwest are our only non-stops from OMA to MCO. They were reasonably priced & offered good flight times. I jumped at them, but these non-stops will end mid-April. SW is what we have been flying, and will continue to do so unless Midwest comes up with some more non-stops. With SW we're able to book flights that will have 1 stop, but we don't have to change planes.