I'm waiting on my new macbook pro to be delivered but was wondering if others just used their new MacBooks out of the box or if anyone would re-install OS X right from the get go to have a fresh install and not the factory install (i've read some stories online about "bad" factory OS X installs causing problems). I'm wondering if there was any harm in doing a fresh yosemite install for a new machine or if it would be a waste of time. Thanks.