Pros:
Is free.
There are many easy to follow tutorials.
You do not need a large processor for simple things.
You have many options to mold objects.
It has an internal game engine.
Cons:
It does not use all computer processors by default.
It does not work correctly with polygons with more than 4 sides.
Does not have a source of income to hire specialized developers.
-You can do the same in many programs.