What is the best form of black seed oil nigella sativa cumin to take? Brand names?

I ordered some black seed oil on line. It came with the seal broken and tasted terrible. I was worried so I threw it out. I ordered the seeds from The Spice Way and put them in a seed grinder. I grind one teaspoon onto yogurt or honey. IMO it tastes terrible plain. Does anyone have an informed opinion based on research as to what the best form is? Is it supposed to taste terrible? Do the capsules cost much more? How much do you take? Are some company black oils better than others? I can see adulterated product being made, especially from foreign sources.