I have read it. I spent my 20s guiltily reading all of the books I was supposed to have read in high school but used Cliff's Notes instead. From my 20's perspective I found Finn insipid and hokey but that's because pop culture had recycled it hundreds of times since its first publication, however when I consider it from the period perspective I can see the satire and the pointed allegories that made Twain so formidable. (Funny you mention Hemingway. I loved his writing in my 20's, then went back and read some again in my 40's and was like "huh, this irritating and immature, no wonder i loved it in my 20's.")