After flashing to the Sprint 6.5 stock rom I've tried smart lock 2.0F from here:
http://forum.xda-developers.com/showthread.php?t=505032
and it does not work.
I can lock the screen manually by pressing the start button and then lock at the bottom left corner but it wont lock if I turn off my screen...which is what I have the smart lock settings set to.
Before flashing to Sprint 6.5 stock, I've been using Malrom and smart lock works fine on Malrom.