You need both (Score 2, Insightful)

I think that BOTH the comments and the code need to be readable. I've seen code with lots of great descriptive comments, but when you look at the actual code you can't tell if it does what the comments say it's supposed to do. The same holds true for the reverse. I've see code that's well structed, readable, descriptive variable names, etc. But without some comments about how all the pieces fit together the code can still be confusing.