The Miracle Complexion Sponge by Real Techniques is highly recommended by Allysa in her video review. She emphasizes the importance of wetting the sponge before use, as it helps the makeup to apply smoothly. The flat side of the sponge is ideal for applying foundation all over the face, while the pointed side works well for concealer under the eyes. Allysa praises the beauty blender as one of her favorite beauty tools. Overall, the Miracle Complexion Sponge by Real Techniques is a versatile and effective product that helps achieve a flawless makeup application. However, it is important to note that the review does not mention any potential drawbacks of the product.