The definition of lacklustre. Needed more action to make up for the slowness.
I'm not saying 'Yellowstone Kelly' is anything all that bad, as it isn't. However, it simply fails to make for an entertaining Western. Clint Walker (Kelly) and Edd Byrnes (Harper) don't have the necessary chemistry, though are likeable. None of the other characters, including the inappropriately cast Native Americans, are all that developed.
It has recognisable Western themes, so fits in under those requirements I guess. It's just simply not exciting or enjoyable, it's very bland in truth. Doubt I'll remember this one.