Now, not so much but back in the day, before Mimi's, Marie Callender's and all the other countless restaurants that have popped up since, it wasn't too bad. There weren't too many choices and I was too young too know the difference. It was a spot for late night high school partiers. It was a good hangout and they were fairly tolerant, as long as we spent money. This was the late 60's and early 70's.
Later when my wife and I were raising a family you couldn't beat Denny's. The food was good enough for us and there were plenty of other families with kids so it was okay for the kids to make a little noise. Plus, it was cheap eats.
At the time, you couldn't beat the breakfast'. The menu has changed over the years and for the life of me I can't really remember too much about the dinner menu except that it was mostly typical American food, if there is such a thing as typical American food. The Grand Slam came out sometime in the mid 1970's and over the years several variations followed. I don't know what it taste like now but the chili was good back then. It's been a few years since I have eaten at Denny's but last December when I was sick my daughter brought me some chicken soup and it wasn't too bad. In fact, it was good.
Denny's may not be what it once was, or maybe it is but my perception has changed, either way, there are a lot worse places to eat than Denny's.