don't bug me

Has anybody else tried the Don't Bug Me! patch? I'd be interested in your experience. Mine was mixed the several times I used it. The first time was an early morning at Springbrook Nature Center when it seemed quite effective; but then, how do you really judge? -- maybe there weren't that many bugs around. Several nights later, when I took one of my telescopes out to the driveway to look at Jupiter, I was nearly eaten alive -- patch or no patch.