I am a new beek rolling into my second year, but I have used it and learned this, it attracts allot of attention. So if you have more than one hive use on all or there will be a bit more activity then you counted on. Also I had feral bees constantly exploring for "big cracks" to get in for a taste. As far as benefits to my bees I saw no difference with or without and still have a almost full bottle in the bees fridge.