I bought these briefs more than a year ago and I have never worn them comfortably. They have no space for my balls. I can either let them ride up and start spilling into the dick compartment, or they're pressed down into not-enough fabric over my taint. With a lot of work, I can position everything somewhat appropriately, but within 30 minutes of wear there is inevitable migration.
I have the trunks, and wear them regularly. Those are fine — compartmentalization in general is not the issue here. There just isn't enough space or fabric for my balls.