That one is a heated debate on the forum. I personally leave mine in my primary vessel for at least 3 weeks. If I am adding fruit or dry hopping, I'll move it to secondary. If not I'll go straight to the keg and cold crash it. If I am making a pale, I'll take the beer off of the yeast cake earlier if I am not being lazy about it. You'll find opinons with strong validations for and against secondary. I find that I do not like them and based on the suggestions of the HBTers that have responded in this thread and have made the same kit, I would say let it sit.