They jam packed this thing with all the "big deal" events in Solo's life. Everything every fan has ever had a question about, like, "how'd he get the Falcon from Lando," and "How did he meet Chewbacca," and "How did he meet Lando," seemingly occurred in this one "adventure". There were even questions answered that fans have never asked, like, "How'd he get that last name" and "Why does he always shoot first?"
I mean, it's silly that seemingly every significant event in this character's life, every single event that made him the character we know, took place in this one "adventure."
Otherwise, except for the mis-fire of Lando's droid (what an *ugh* of a character) the film was fine for what it was.