2 things i have noticed:
1. copying data over is slow 4mbs vs on android 4.0 it was at 20mbs
2. contacts dont sync with facebook
issues i had and solved:
1. sd card cannot mount
solution: use TWRP s4 insead of CWM
2. AOSP keyboard has stopped
solution: format the phone. install the ROM and an older gapps. the 4.2.1 gaps has some bug in it i assume.
1. copying data over is slow 4mbs vs on android 4.0 it was at 20mbs
2. contacts dont sync with facebook
issues i had and solved:
1. sd card cannot mount
solution: use TWRP s4 insead of CWM
2. AOSP keyboard has stopped
solution: format the phone. install the ROM and an older gapps. the 4.2.1 gaps has some bug in it i assume.