I feel that DP4/Public Beta is stable enough for me to use it as my daily driver on my main partition. I have a few questions, but here is my setup right now: Main Partition has OS X 10.9 and I have a small, 40Gb partition that I am using just to try out Yosemite. 1. First off, any recommendations/warnings for switching to my daily driver? I use Yosemite almost every day as it is now, it's just getting annoying not having all my programs installed. 2. I have TM back ups for my main partition; if something goes wrong, can I restore back to 10.9? (I want to use TM to continue backing up while i'm on 10.10, so it would have 10.9 and 10.10 backups on it) 3. Deleting the test partition: would you recommend doing from the disk utility (while booting up, not sure for the proper term) before I switch to using the single, main partition?