Material is great, it’s very smooth and your fingers don’t slip at all 
I wouldn’t go for RAT3, RAT5 is a lot better option although it doesn’t have as much options for customization as the 7. I love the 4 DPI presets which you can set manually and switch on the fly. I have the lowest setting at 400DPI for precise movement, next is 1000DPI for general work in windows and so on. Really useful stuff