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I had a coworker once who was proud that he didn't know how to use a debugger. It was something about being able to statically analyze a program without dropping into a debugger that conveyed his superior skill. He only used print statements.

For me personally, I use both print statements and the debugger extensively. When I'm wrangling a hard to understand bug, I'll litter my code with print statements and then once I find a problem area I'll set a breakpoint. When I have more information, I'll even set a conditional breakpoint - I can't imagine wading through a lot of print statements after a few iterations when you know exactly which conditions will trigger your bug.