Nut butters can be very high in fat and calories, just like true butter. However, when you eat pretty healthy most of the time, I don't think some nut butter indulgence will hurt you.
I had some almond butter this morning along with my fruit, for breakfast. Delicious! And the almond butter has protein along with the fat, so I was fuller, longer.
According to Wikipedia, "Being made from almonds rather than peanuts, it is considered hypoallergenic, and, as such, it is easier for those with food sensitivities to digest. Almonds are high in monounsaturated fats, which are considered to be a healthier form of fat than saturated fat. They are an excellent source of Vitamin E, magnesium, and fiber. They contain monosaturated fat, protein, potassium, calcium, phosphorus, and iron."
'Course, I believe there are people who are also allergic to tree nuts like almonds as well as peanuts, but hey, you can't win 'em all....