I use it on steaks and chicken quite often. But you gotta put it on pretty heavy. I don't use it when I'm smoking though because it's so dang expensive and hard to find for me. Tried the KC steak seasoning once, but didn't care for it. Too salty for me.
I haven't tried it either. The only store bought seasoning I do use is "Weber" brand Montreal Steak seasoning. There are Rub recipes here that you can make yourself, a Popular one is "PopDaddys Butt Glitter.
It's Like KC Masterpiece sauce, and their BBQ Joints ....... and since I don't like to say anything negative about other guys BBQ ..........I'll leave it there.
Seriously................... just look around any BBQ site or cookbook, and try to use one you find there. No sense paying 10 times as much for bottled rub.