Fresh Prince is a very alright show and season 4 soldifies that. I never grew up with it, being born after the last episode of the entire series was aired, so I have a perspective on it not skewed by nostalgia. The new actress for Vivian acclimatises herself pretty fast and at the end of the season you don't even notice that the character was portrayed by a different character before. What lacks for me, though is any kind of significant story progression, sure Carlton and Will now go to University, but that's rather out of necessity than story-structure. Almost every newly introduced character is dropped after one episode, Will's Dad, Ashley's "Boyfriend", and many of Will's "Girlfriends" just to name a few. Still a very alright series, if you like Will Smith, you'll definitely like this.