Easiest Way to install Polymer

I already tried bower.

If you prefer bower to install polymer for your mobile development, you can proceed this reference:
http://blog.nraboy.com/2014/07/use-polymer-apache-cordova/

https://github.com/infomofo/cordova-polymer-template
Here i prefer accomplish this using bash.
https://www.polymer-project.org/resources/tooling-strategy.html#clone

You need setup your public key for your github account.
https://help.github.com/articles/generating-ssh-keys/

I don't know why am i suggests you to choose the bash instead of the bower. What i know here is bower is JS base. May be the JS easy to crash.

Thats all from me.