The Everyday Essentials - 5ct by Real Techniques is a must-have set of brushes, according to Nivine's video review. She highlights the versatility of the brushes, with the number 400 brush perfect for powder application and the number 200 brush providing a flawless foundation finish. Nivine also praises the number 402 brush for setting powder or highlighting specific areas. She mentions using the sponge, which can be used dry for full coverage or damp for a dewy look. Overall, Nivine loves the brushes and considers them her favorite, emphasizing their effectiveness and versatility. However, she does not mention any potential drawbacks of the product.