I haven't read it, but I did read his book 1984, which I thought was very good. I've been meaning to read this one for a while.
Nice statement against totalitatarianism and the dangers of corruption, but I liked 1984 better.
Read it years ago, and many of the images have stayed with me. I especially love how the pigs become like the farmer, and how the laws keep changing the more they're read to the other animals ...
I loved the use of symbolism. It is a good novel to teach how writers use symbolism to enhance theme.
It is also a rather clever historical parallel to Russian history. Orwell was quite meticulous, such as using the animals' flag of hoof and horn to represent the Soviets' hammer and sickle.
And it is not without a sense of humor to it. The pigs break into the house and bury a ham is one example.
Orwell (or the world in general) never foresaw the day that the Soviet Union would break apart, though.