I’m a fan. I think it smells like melted crayons (the original scent) and I personally don’t find it any more offensive than most other barn smells, although it does make me cough if I’m not careful.
I try to apply it outside and not in the barn, per the instructions. I put it on chest, legs, bottom of belly, and wipe a little or do a tiny quarter spray between the ears and at the dock of the tail. It works better than any other fly spray I’ve ever used, and in conjunction with a Rambo fly sheet, my horse doesn’t come in with nasty oozing bites anymore.
I bought a gallon of the original scent when it went on sale at SmatPak, so I should be set for quite some time! I’ve seen it go on sale more than once, so keep an eye open.