I was wearing an older kid's helmet that someone gave me for a couple of years and it was really comfortable but beginning to fall apart. After not liking the look of the duct tape to keep it together, I bought a Troxel Sport in periwinkle (bluish-purple). Love the color and it looks nice but it's not nearly as comfortable. It has the neat adjustable band but still makes me feel like my head is too long, front to back. It puts pressure on my forehead and in the back. I thought maybe I bought the wrong size but the larger one wobbled around too much and the shopkeeper told me to make sure it's snug.
During a ride, I don't notice the discomfort too much, but am really glad to get it off at the end of the ride (only an hour or so later). I'm sure there's a more comfortable one out there but I didn't want to pay over $100. I bought this one for about $50.
Maybe I have a funny shaped head.