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The album received positive reviews from music critics. His talent was praised for the album. Schmidty of BoxCarFlow said "Sleeping In Class showcases an enormous talent with tremendous promise." While iHipHop wrote "Casey brings a much more conventional flow and attitude to his work." His lyrical delivery was praised as iHiphop wrote "He works clever turns of phrase, setting up decent punch lines and flowing with a decent amount of energy."
In addition he was praised for his maturity. Undergroundhiphop wrote "Casey's ability to rap about the trials and tribulations of a young adult while ...appealing to an older crowd is what makes Casey Veggies one of the most promising freshmen on the west coast." While Schmidty wrote "He delivers thoughts ... about life, school, relationships, his hometown of Inglewood and trying to make a name for himself." The production was fairly praised. While iHipHop wrote "The strong point of the album though has to be the production, with more than a few songs on here that go pretty hard." For one particular song they wrote "30,000” has heavy drums and an alien sounding synth line that sounds like a spaceship’s theft deterrence alarm." Schmidty wrote "Production-wise, there are some truly impressive beats from a slew of relatively unknown producers, with exception of a few names."
The guest appearances were also acclaimed. Stone of hiphopspeakeasy said "He also got some interesting features on this album." He was praised for straying away from typical rap themes: Grounded in a reality that some of his peers reject, Casey never tries to exaggerate his life’s journey into an ... adventure full of drugs, murder, rape and dinosaurs wrote Schmidty of iHipHop. Then, his potential was remarked about the album. iHipHop wrote "Sleeping In Class may not be Casey’s defining moment, but it could be a key character builder leading up to that moment." Schmidty wrote " There is no denying that this kid’s got some serious potential."