Fast saves in my Nikon Coolpix S8200. Here's my test: I was traveling with my tablet, laptop and camera, when my laptop crashed. No longer able to transfer photos from camera to laptop via my class 10 SD card, I bought the only microSD card that the big box store had (a class 4). The class 4 microSD card with adapter worked in my Nikon Coolpix but I kept seeing messages to wait while the card finished saving. Since switching to the SanDisk microSDHC class 10, there have been no more wait messages on my camera.