It features 23 unreleased recordings from the 1994–1996 period, the majority of which are remixed. Others retain their original form or are complete finished mixes, such as "Fuck 'Em All", "Late Night", "Ghetto Star", "Better Dayz", "Who Do U Believe In?" and "They Don't Give A Fuck About Us". The album features appearances by Outlawz, Ron Isley, Nas, Mýa, Jazze Pha, Tyrese and among others. The hit single, "Thugz Mansion," comes in two versions: an acoustic version featuring Nas, on which the music video is based, and a hip hop version featuring Anthony Hamilton.
John Bush from AllMusic wrote: "Though it was released on the eve of the busiest year in 2Pac's posthumous career, Better Dayz shouldn't be overlooked—and with the schedule including a feature documentary (with soundtrack), plus two books and another double album, it might be easy for this one to slip from the radar. A lengthy two-disc set, it benefits from a raft of still-compelling material by one of the two or three best rappers in history, as well as excellent compiling by executive producers Suge Knight and Afeni Shakur, 2Pac's mother. Organizing the set roughly into one disc of hardcore rap and one of R&B jams makes for an easier listen, and the R&B disc especially has some strong tracks, opening with a remix of 1995's "My Block" and including quintessentially 2Pac material—reflective, conflicted, occasionally anguished—like "Never Call U Bitch Again," "Better Dayz," "Fame," and "This Life I Lead." Most of the tracks are previously unreleased, the rest coming from scattered compilations like Knight's Chronic 2000: Still Smokin' or 1995's The Show soundtrack. It's 2Pac's best album since his death, and bodes well for future material by, and concerning, rap's most legendary figure.Kludge magazine included it on their list of best albums of 2002.
The track "Ghetto Star" has appeared on the soundtrack to the video game 25 To Life.
Better Dayz sold 366,000 copies in its first week on the charts.The highest ever. It has sold 3,000,000 copies in the United States as of 2011. On January 31, 2003, it was certified 2xPlatinum in the U.S and then certified 3x Platinum on August 2014. The album was also certified 3x Platinum in Canada May 2003.