I have made myself two of the extreme flattops, and have made many for my customers. It is a total different feel on your face. You have so much more hair in your face than a normal fan or a bulb shaped knot. It takes some time to get used to, but then, you will love it. One word of caution: I would not go much above 22 mm knot size. I think these flattops are great in 18, 19 and 20 mm. One of my customers choose a 24 mm one and it is really huge.
PS: I would love to upload a couple of my pictures, but the size here is limited. if I get to it, I might re-size them and show here.