I like that Google Plus is very focused on ways to really connect me with the specific groups of people I want to connect with, in the way that I want to connect with them. I create 'Circles' of contacts, use Instant Upload to share photos I've taken, Sparks to send me info I'm interested in, and Huddle to create a group chat. I can probably do all of these things through Facebook, but I like that the core app is focused. Doing less is often a good thing.
Of course the biggest challenge that Google Plus has is scale. If the people I care about don't join, its irrelevant. But hopefully Google Plus will create more buzz than Buzz :)