My family and I occasionally suffer from museum fatigue. We have limits to how much wandering around we can do, taking in sights and reading about what we're seeing. There was no such issue with Musee d"Orsay. The building and layout are spectacular, and we actually would have stayed much longer than a few hours had they not been closing. If it held only works of the Impressionists and Post-Impressionists, you would still be amazed, but it is much more.