I just finished the sync update on my 2013 F-150 with My Ford Touch, no nav.
It updated to version GEN2, Version 3.5.1.
It seems fine so far. The udpate took about a hour, and afterwards I had to re-pair my phone. It downloaded the phone book fine, and overall does seem a little snappier and quick.
I was able to go back onto the website and and successfully report the installation as completed. I was surprised to see how many files were installed. No wonder the download from the website took about 45 minutes (1.7 GB), and the installation took a hour.