Are pinhole spectacles generally comfortable?

Doubtful. They limit the peripheral vision significantly.
Pinhole specs. They work by making light rays enter your eye in parallel, thus eliminating the need for lenses like glasses. Nobody can use these for normal use, they aren't useful as the field of view is too narrow. It's just a gimmick. We use it to see if you have a refractive error, as if they help you do, if they don't you don't.