Major Flaw!
If you are large, then you junk basically gets stuck in the pouch, it is rather uncomfortable to have it basically covered by a sock. If would've been better if there was no opening between the junk pouch and the other pouch, instead you feel like something is squeezing your junk.

Additionally, 30+ years of being told you need to wear underwear, I'm not sure how I feel about this "no wearing anything feel" ... each man/other to them themselves.