Best reason for a Google Voice number is: If you decide to change carriers or for what ever reason the only way to get a good discount on a phone is a completely new line of service it no longer is an issue.

You can give out your Google Voice Number and change the number it forwards to without ever having to bother with letting people know your new number. Works great for when you destroy a phone a pick-up a pre-paid to last you until Sprint caves in and gives you the phone of your choice......J/K....

But seriously it works great for not being tied down to a network. It gives some freedom - keeping in mind it locks you down to Google and their permanent record keeping.

Plus the biggest plus of Google Voice is blocking individuals or controlling the flow of phone traffic. Meaning while Verizon, Sprint, At&t and others will give you the run-around that they cannot block a number for you.................You can fix that yourself by creating a block list or treating certain numbers as SPAM like e-mail so that you don't have to be bothered by them!