Strengths: Everything. Ever since i got them they have gave me no problems what so ever.
Weaknesses: when it gets dirty on the chainring side its hard to clean as its a see through one and you can see the dirt through it. But other than that there is none at all.
Bottom Line:
If your looking for a crankset that is strong, well working and most of all cheap then these re the ones for you. They will give you all the strenght you need for all types of riding from xc to Downhill(As they are a downhill crankset).