I've used the Liquid Fence Deer Repellent for more than five years and found it very reliable as long as I respray every 2-3 weeks during the season. This spring we had a family of whitetails eating all the new buds on our young plum and cherry trees. I immediately started with the Liquid Fence and the trees haven't been touched since. We still see deer nearby but they avoid that area, even long after I can't smell the spray anymore. In my experience, the odor is barely noticeable 24 hours after application. Liquid Fence is expensive but I buy the concentrate for my pump sprayer and a bottle lasts me a year.