It has it's advantages and disadvantages..
Some of the dis advantages are:
It has a very large grain size making it difficult to meter.
It is harder to ignite than BP
The smoke is toxic, and smells weird.
Does not work in flintlocks.
Does not clean easily with water.
The hard fouling that accumulates from repeated shooting (crud ring) can be difficult to remove.
Some of advantages are:
It has much less accumulated fouling.
It is the least corrosive of all the BP substitutes.
It works great in cartridges.