 On release, Yosemite received positive reviews, with users praising the simplified user interface.Programmer John Siracusa, who had reviewed every OS release, wrote for "Ars Technica" that "Yosemite is an aesthetic one-way valve... switching back to Mavericks after a week or two in Yosemite is like returning to iOS 6.Everything looks embarrassingly chunky, glossy, and gaudy."