[slowdown]

One more important thing about these custom URLs:

1) Your Google+ profile is publicly indexable by searh engines.

2) Having a custom URL means anyone searching for your name on Google is going to find out your Google+ profile easily. Basically, your identity is now even more easier to discover. (When contrasted to the ordinary Google+ URL of random numbers)

3) If you are using the same profile picture on Google+ as your Facebook, people can track your Facebook profile, too. This is bad if you have a fairly active social life, but wanting a bit of a privacy.