Math 31A Professor

For those of you who've already taken Math 31A from one of the three professors teaching it this semester (Higgins, Keranen, Ding), could you recommend whose class to take based on workload, test/homework difficulty, clarity of explanation, etc.?

Professor Higgins seems to be popular, but he's not as highly rated on BruinWalk, so I'm not too sure what to make of that. If anyone has experience with any of the three, please share how you felt about their class overall.