If everything works well, why update?
If you out of curiosity wants to try the new OS X Version, install it on a second or an external hard drive and give it a shot... (press "alt" while booting to chose boot disk/system).
2013/10/25 <essessem@...t>
I'm excited about the free update Apple is offering, but I don't know how close QTR is to being supported by it. Someone, enlighten me!