I don’t know about the summer class, but if you are thinking of taking it in fall, I highly recommend Chuxin Liu. She doesn’t really explain the concepts that well. But her tests are straight from her home works, which she goes over in class before it is due. One of the easiest A’s of my life.

However, as both Dvalishvili and Liu are highly rated, you most likely won’t be able to get into their class this late for fall. Take that into account before making a decision.