We’ve used the Visits To series in our co-op for 4-5 years now with kids 6-18 years old. Retention has not been 100% for every student, but it’s good. My own kids (17, 14, 11, 8) have 75-85+% retention of all continents studied. I’d say that’s pretty great myself. For those with less retention, they’re still getting exposure.
I liken this to Artist Study for my ds14. He has always done it, but never cared for it. However, should we visit a museum, he is familiar with some styles and artists and can appreciate it even if it isn’t his thing.