We visited the Denver Art Museum - adjacent to this Museum before visiting this one. Seeing the evolution of his art over his lifetime was moderately interesting - did not see the beauty or wisdom of his work in later years.
Seeing 2 floors of all one persons art gets old - especially as more recent work began to look like a single colored piece on a huge canvas - only brush strokes being different.
Felt it was not worth the money.
NOTED: googled to 10 museums in greater Denver area - Denver Post did NOT list this museum. I believe I know why.
If you are time limited can resist this one.