I got a pair of knock-off sleep headphones for Christmas. I'm loving them. Admittedly I can't comment on the particular brand you linked, but in general it is a brilliant concept. I sleep with them almost every night and the comparison to when I used to sleep with earbuds is just great. The internal speakers can get off of your ears and a bit hard to hear if you toss and turn a bit, and for working outside, I'd probably recommend regular headphones, because of the ease of dislodging the headband, but for sleeping it is infinitely more comfortable.