I've used it and it does work pretty well. It doesn't kill instantly, so it's still a good idea to check for ticks every so often. I've found ticks embedded a couple different times, but they were dead. I've walked through some grassy areas where my legs were covered with ticks, and later they were all gone.

If you use the spray cans, Sawyer's aerosol cans and spray bottles both clog frequently. I use Repel Permanone instead. I used to get it at Walmart but haven't seen it there in a couple years, so I order it from forestry-suppliers.com.

Others here have used the soak method, but I haven't.