Took this on a two-week camping trip and barely got a single mosquito bite, even sitting out at dusk by the lake. The 30% deet actually keeps the black flies off, and I like that the pump gives me control over how much I spray instead of an aerosol cloud.
The 3.4 oz pump bottle fits nicely in a jacket pocket, and the 30% deet actually kept the ticks off during my hikes. Only gripe is the spray comes out a bit fine, so you have to hold it close or the wind takes it.