I live in the city, therefore, I don't have a deer problem. What I do have is a BIG squirrel problem. This product keeps the squirrels out of my flower beds. It keeps them from digging up  veggie seeds, like snow peas, other peas.beans,bulbs, etc. they don't bury their nuts in my pots anymore. I know 2 people who had huge car repair bills due to squirrels chewing the coating off the wiring. I have used this product for 2 years. My husband sprays our parking area and the underside of our vehicle. I can't say I know how well it works for deer, although I have heard it does. Most other repellents I have tried in the past had a really foul smell and the neighbors would complain about the smell, and they didn't work for squirrels. Since this product contains peppermint oil and I heard that squirrels don't like it, I decided to try it. I am so glad I did, and the neighbors no longer complain,either.