This guy is alrite. He has strong accent that no one understands, so going to lecture is only for the notes. The homework is long, but definitely do them as most exam questions are straight from the homework problems. For the finals, I only studied his notes and the homework problems and I got a solid A. Good luck :D

A VERY awful professor. I have tons of experience with Chinese professors who started English late in life and have never had a problem understanding them, even when others in the class were complaining about it. That said, this guy is incomprehensible. Apart from that, he has nothing to offer.
His lecture consists of silently copying something from his notes (which is straight from the book) on the black board for like two minutes with very sloppy handwriting and then discussing it in his special Chinese-English pidgin, or whatever one could politely call it. I'd say only about 10% of the class was going to lecture consistently.
Given all this, differential equations is a very easy thing to learn, the UCLA course is very slow-paced (only a few chapters total) and the Polking book is very clear. Learn it on your own, like you probably do with most math. So if you are one of those blessed few who actually demands engaging instructors from your university, avoid this guy. He certainly damaged my idea of what kind of school UCLA is and who they let teach.

In all honestly, Song is a pretty lousy professor. His lectures are borderline incomprehensible, and you have to mostly study from the book. That being said, his midterms and final were extremely easy...mostly homework questions regurgitated with different numbers. I probably skipped half my lectures and did decently well on the midterms and final, so I am expecting a B+/A-, if his curve is generous then an A is also possible. My recommendation: if you can study on your own from the book, take Song. His class is extremely easy as long as you can teach yourself.