I was eager to see this film, largely because of Robert Downey Jr. The poster alone was enough—he’s quite attractive! The film manages to be amusing, though not laugh-out-loud funny. There's also a tender quality about it. I certainly felt pleased just watching Robert Downey Jr. being himself; he looks great whether he’s polished or more disheveled. And then there’s Zach Galifianakis. I thought he was hilarious in *Hangover*, and I was taken aback to see him in this movie because, beyond his comedic performance, he has a few crying scenes that are genuinely moving. This movie felt exhausting. It really did. The numerous ups and downs they experience left me feeling drained. My rating is a B+. I couldn’t possibly give Robert a bad grade, haha.

Source on TMDB