For such a small stadium, the Grandstand seats sit awfully high up there. Finally got to see my Cowboys in Chicago a few weeks ago. It doesn't seem like they come to Chicago often enough and for someone that never has the opportunity to get to Dallas, I had to take advantage of the opportunity. I could only afford Grandstand seats for the game and as you could imagine, there were a ton of Cowboys fans in attendance but were good natured.
The grandstand is on a huge mountainous incline for what I believe is to enhance the sight lines but it would be a tough walk for some older folks. I don't recall our row but we were maybe ten rows from the top. The aisles all the way down are small so you will have to dodge the beer hawkers to get to the bathrooms which are just as old as Wrigley Field.
Prepare to be snuggled up with the neighboring fans in your row too. Not much wiggle room between each seat which isn't such a bad thing for those cold wintry games. At least every seat had a cup holder for the price-gauged beers although exiting fans definitely had the ability to spill some of it. The design of this place is downright awkward but a lot of fans would always knock the "Cookie-Cutter" look so I guess the grass is always greener on the other side.