This isn't bad, but I used home-made curry powder and it was very strong! I'd halve it next time, but you might be OK if yours is less fresh. I used vegetable stock (being vegetarian) and I'd say it only makes 2 or 3 serves, unless you're having something else with it. It's certainly very easy to make.
Excellent soup. I used the recommended 2 tsp of curry powder, as it was quite a strong one with whole spices in it, and I would use the same amount next time. I used a hand blender to blend the soup in the saucepan, to save having to transfer it to the food processor. A good, warming recipe!