I just had the misfortune of eating there for the first time ever. My mom got a water, it came 20 min late. I got a cesar salad, it came in my lap... Luckily it had like 1% dressing so it didn't stain my jeans. No manager came over to talk to us and apologize, no discount or anything was offered, and the server left the half salad on my table still... My lobster didn't seem very fresh either, as it took me breaking the tail to be able to remove it from the shell, it did not come out through conventional means.
Overall: if they had lobster at Denny's, I'd rather eat it there.