Just Because It's Free, Doesn't Mean You Need it

Do I really need a GPS unit? I usually just drive around the lower mainland and if I know I'm going somewhere I'm unfamiliar with, I'll check out google maps beforehand. I always thought a GPS was for one of those drivers that gets lost all the time or can't read a map. But then again, I have some friends that are generally pretty competent drivers and they say their GPS is great and they love it. Is it something that will just distract me? Maybe Celia needs it. Maybe neither of us need it. Here's the thing: I don't often get lost, I usually just drive in the lower mainland/fraser valley, I don't travel much, and I have google maps on my blackberry. If the GPS is free, should I get it anyway?