In Animal Farm by George Orwell, was the animal revolution successful?

In Animal Farm by George Orwell, the animal revolution was successful to the extent that the animals took over the farm from Mr. Jones and his wife, but in the long run, the animals (except for the pig leaders) were just as bad off, if not worse, than they had been before. In the beginning, the animals' lives improved greatly, and everyone was willing and happy to work for the good of the farm. Over time, as the pigs, particularly Napoleon, gained power, things changed. Napoleon became very human like, forcing the other animals to work long hours for little reward. He trained the dogs to attack anyone he considered to be a threat to his power. He began living in the house, breaking all of the commandments the animals had set forth for themselves. With power often comes corruption, and this is what happened to Napoleon. The other animals suffered because of it. So, yes, they won the revolution, but in the end it did them little good.