The 360 Ultimate Blend Kit - 3ct by EcoTools is highly recommended by Whitney in their video review. Whitney mentions having many brushes that need to be discarded, but they are a fan of this kit. They specifically mention using it with foundation and being impressed with how it removes oiliness and leaves a clean finish. Whitney appreciates that the brushes still have content on them even after use. Overall, the product seems to be effective in providing a smooth and oil-free application. However, no potential drawbacks are mentioned in the review.