This is very small and comfortable to keep in pocket. The main use is for listening to music, photo and fitness. There is nothing more than this. The touch is awesome. This is from Apple. So no doubt the touch will be great!
But now a days, everything comes in mobile apps. The Android and IOS have wonderful apps which are a replacement for this.
Apple iPod nano 6th Generation is tiny. So it is not so comfortable in viewing the photos also! At present, this can be considered useless because everything comes in a mobile and no need to carry one more device which has very less features.