Great, but ...
I bought these during radiotherapy treatment for recurrent prostate cancer. The radiation affects both bowels and bladder and I wanted to be confident that I'd be able to go out without embarrassing myself.
In many ways the experience of wearing these is very similar to wearing normal boxers, though they are cut a little higher than I'm used to.
Importantly, they fitted under my normal jeans and joggers, without the bulk associated with other options.
I wore them night and day for some weeks, with no problems other than them being too warm to wear for any exercise other than a short walk in chilly weather. Once I started building my fitness back up by running and walking they were of little use, so I returned to using normal boxers and a small protective pad.
If they were more breathable, I'd give them 5 stars, but that's probably being a bit picky because overall they were excellent in giving me both security and confidence when I needed them.