Today I received a free Febreze Set & Refresh air freshener directly from P & G. The fragrance was Sweet Citrus and Zest. FREE Febreze Set & Refresh Air Freshener & Review This scent is wonderful. It made the whole front part of the house smell terrific. The scent lasted quite long, about 3 weeks. It did not smell as quite as strong as the first few days, but there was still a nice fragrance when you walked into the door. If you were in the house for awhile, you couldn’t smell it much anymore. If you were outside of the house for awhile and came back in, then you could smell it faintly. It lasted about 3 weeks until we threw the cartridges away. They claim it will last 30 days, but it fell a little short of that for us. Edit: 3/25/14 This scent is no longer available but Set & Refresh units and other scents are still on the market.