Mac OS X 10.10 Yosemite review

Our review of OS X 10.10 Yosemite looks closely at the new features in Apple's Yosemite operating system, and answers questions about the ones that don't work as expected - such as Continuity, and the wireless problems that have been afflicting Yosemite users since launch. Plus: can upgrading to Yosemite slow down your Mac?
Macworld UK