+1
I ve not installed it. Don't have an I Phone and see no reason for the change. Besides this is my only computer and I am in South America traveling - so why rust breaking things. (late 2011 MBP 8 GB Ram, spinning drive, I5 Proc) I might think about it in 10.2 but not sure then. Only thing I anticipate doing is installing an SSD at some point.
Expat