The 16 GB variant are effective 14.83 GB in my HTC Sensation. So enough space for music and recording of HD videos.
I have in my gallery thousands of photos and thumbnails are already loaded all within 4 seconds.
HD video (1080p) can store and play without delay.
The map is in use in January and the X-Rays of various airports has survived on 3 continents.
Within 6 months, the SanDisk Ultra Micro SDHC 16GB Class 6 was not detected only twice. Restart of the smartphone helped.