Despite our few nitpicking critiques, it was actually hard to find fault with this vacuum cleaner. You can tell that a tremendous amount of thought has been put into this design and we are sure that other manufacturers will be rushing to copy whatever they can. Apart from the weight and size considerations, you will be more than thrilled with this vacuum. It does a superb job and all its features have been designed with us consumers in mind. The D4 in white also allows the consumer to choose which carpet tool they would like included with the vacuum. This is great for people who have lots of carpet and an open floor plan and would benefit from the large 15" power head, or for those who have mostly bare floors with a couple of area rugs and only need a turbo head rather than the more expensive power head option.