TPP generally will be to the advantage of countries that sign onto it because it allows them to excel at their specialty.

Specifically, for the United States TPP could help to rebuild manufacturing in the products we specialize in, such as technology, computer hardware software, and increasingly, automobiles. Really, there’s no limit to what United States manufacturing can do if it’s geared up.

We just have to watch currency manipulation, keeping things fair. There is an acknowledgment between member countries that it won’t be tolerated, as everyone can play that game, except it’s not everyone’s interest to do so.
TPP creates standards by which free trade can be fair trade. Not to mention the trade agreement stands to have Geo political ramifications for the good as countries work closely together to build and maintain stability, generating prosperity for all in route to improvements in freedom, human rights and ultimately, peace.