Nik Collection free

2

Today Google announced it's making the Nik collection free to download: Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro and Dfine. Has anyone used them?
http://www.openculture.com/2016/03/google-makes-its-149-photo-editing-software-now-completely-free-to-download.html