I use single-blade disposables to trim around my beard (cheeks and neck.)
Dry.
Electrics don't get close enough (and yank hairs out of the beard) and twin-blade razors cut too close and these curly wiry whiskers of mine ingrow.
Why anybody would want to spend good money on a plasma-engined twelve blade computerized disposable razor is beyond my understanding.
Now, if I can get one to shoot superheated plasma streams *and* shave... I'll pay for the disposable power cartriges.