Paulina's review of the Precision Duo Contour Brush by Iconic London is overwhelmingly positive. They found that the brush made it easy to get perfect straight lines when contouring the nose, and that the fluffy side was great for buffing out the product. They also noted that the brush works with both cream and powder formulas, which is a great feature. Paulina was impressed with how much easier it was to use this brush compared to a standard brush, and highly recommends it.