If I could give this place a 4.5 rating, I would. It's not perfect (a 5), but it's better than above average, especially for a diner. The Steak N Egger on Route 66 replaces the former dive known as Snuffy's 24-Hour Grill -- it's in the same historic building made of local Joliet-type limestone (really dolomite) in an unusual shade of pinkish buff, except that the building has been totally renovated inside while the exterior has been preserved as much as possible (less than four months after the renovation was completed and the place reopened, some dork drove off the road and smacked into a truck parked against the side of the building, shoving the truck through a wall and destroying part of the limestone facade; as the local limestone is extremely difficult to match in color, the repair unavoidably changed the original profile of the building -- but the new owners did the best they could to preserve it, under the circumstances).
The shiny new interior is retro 1950s-60s style, complete with jukebox and loads of Route 66 memorabilia, very comfy and easy on the eyes (much more so than Snuffy's had been the last 30 years of its existence, when you were doubtful about actually sitting down anywhere, let alone ordering from the grubby kitchen). Despite what one questionable curmudgeon here thinks, this is a welcome improvement. The current owner, Terry Carr Sr. is part of a three-generaiton Chicago area business and himself a big Route 66 fan, so you could hardly have a more sympathetic management here -- and they know how to run a proper diner.
History and rehabbing aside, the food's pretty good and so's the service. I've never had a bad meal here, and I've been by several times since the reopening. That said, the steaks are diner steaks, i.e., not prime-grade aged steaks like you'd get at a fancy steak house -- the breakfast steaks are thinner, and both the breakfast and dinner steaks can be a bit gristly here and there (best to order them medium rare, NOT well done as that will make them tougher). But that's exactly what you'd expect in a diner at diner prices, so no surprise there, really. Everything else is pretty decent for the price. The eggs, omelets, and pancakes are fine, and I really like the French toast and the patty melt. Sure, I'd prefer real maple syrup, but at these prices I'm not going to complain about that (if you want something equivalent to Walker Brothers up north, you're going to pay those prices, too; this is blue-collar McCook, and a Walker Brothers Pancake House would be sorely out of place here or anywhere else on Route 66).
All in all, I'm pretty happy with this place. Sure is convenient in the wee hours of the morning, and it's a good breakfast or lunch stop for someone making the trip down old Route 66. Free WiFi inside, ample parking, too. The fact that the village of McCook planted its complete-rip-off Welcome to Fabulous (?!?) McCook sign in the parking lot is just gravy -- we can't stop laughing about that. I'd recommend this place to anyone at any hour. Look here for further details on the rip-off McCook sign: http://bit.ly/1fOqoX1 Like I said, 4.5 of 5.