I've been using this for years and would highly recommend it!

I know that bug sprays can be controversial because of all the chemicals in them. But Off Deep Woods gets my vote because when it comes to getting bit by bugs, I'd really rather not, thank you! This stuff does the trick everytime. When I use it, mosquitos, ticks and other flies leave me alone. That to me, is worth the chemical risk!

I'm always dealing with black flies, mosquitoes, horse flies, deer flies, ETC. in the summer time, so it's either cover up completely or use insect repellant on hand. I choose the latter! (Even though I'd like to try something more natural...)
I've used this a few times in the past month and it's kept the bugs away from me for the most part (the mosquitoes are more persistent than black flies, maybe the spray doesn't work as well on them?). The bottle says it repels for up to 8 hours, but I don't find that it lasts that long, more like 4 hours.
It's unscented, and I haven't noticed too much residue or 'greasiness' after applying it (there is a little bit, but not much and they have other formulas for that anyways).
The price is kind of high for these products, but they DO work.