I notice that the camera performance is very poor in low lighting condition in manual mode with flash the timing of the flash is not accurate, however in low light in night mode with flash the object is okay but its not that vivid/crisp/detailed. Front camera does the same performance in low light even though with flash the flash still cant manage the object with its best performance.
Double tap to wake feature is not not very responsive as the other previous Flash Series smartphones you need to do it many times to wake your FP2 however the double tap to sleep is accurate.
Hi-Fi audio is amazing but if you try to mix sounds with effects as if your a DJ the quality of the sound and speaker become horrible The speaker cant manage the sound.
Data connection is fluctuating sometimes the connection was lost this happens a lot of times when i tried to use the internet using data connection.
Anyway, over-all performance are great! I believe Flash will going to fix that issue on their upcoming update this august, hopefully. Thanks flash