Ease of use
Ecosystem (apps, drivers, etc.)
I briefly had an Ipod touch that my sister gave me when she switched to an Iphone (my brother inherited it from me when I got an Android phone). It worked and worked well, I just didn't care for it much personally, I like being able to get in and tweak things a bit more. The keyboard didn't do much for me either. The eco-system was great with a lot of apps available, it' just isn't the OS/hardware for me. But, your not going to go wrong getting one of Apple's devices with this OS on it.