Someone gave me a Frankincense candle and it's pretty amazing, very sweet and if I burn it for an hour the apartment is scented beautifully for several hours, although this is easier to pick up when you reenter the place. Still, it's an impressive diffusion. I'm new to fancy candles ... but this one really impresses me.
Available online at Neiman Marcus only and, alas no frankincense offered. Retailing at $28 I would say it's worth it.