Well if I am making Thai green curry I would use lemongrass, ginger, chilli and onion as a base, so perhaps blitz those into some yoghurt. I would be wary of the ready made pastes in case they contain any nasties.
I thought it was good because you get the different spices and can mix to taste.
Contains:
Ground galangal.
Fine cut lemon grass.
Coriander & cumin mix.
Cumin seeds.
Kaffir lime leaf powder.
Ground black pepper.
Ready-mixed curry pastes (Indian too) contain oil which is why you should avoid them, esp if you recipe calls for 1 Tb of paste and stick with dry spices - but check for added salt etc.