Techradar updated their OS X 10.9 Mavericks review
The tenth major revision of OS X, Mavericks, marks an attempt at a fresh start.OS X 10.9 Mavericks Review
Oh yeah, and it's available as a free download! Apple has decided it should treat the Mac community in the same way it has been treating iOS users and ship the update free via the Mac App Store.
Mavericks introduces new features that are aimed at professionals, updates major interface components, it overhauls the system's branding. Big cats are out, and California locations are in (Mavericks being a surfing hotspot).