So much promise, So little quality!
1) DEVICE
The device basically jumps your Mac mouse pointer all over the screen. Its too sensitive to your finger movements. Also when connected to your Mac via Bluetooth, it only shows up as connected in the Bluetooth menu, but does not show up in the Bluetooth control panel list.
2) SOFTWARE
The Mac application software is absolutely terrible in design. First there's mispellings all over. Second, the firmware updating is so confusing that it nearly cannot happen without either app or user error.
Next the mode configuration (Air Mouse/Gesture/Joypad/App) are really confusing as they don't specify what the purposes or benefits of each so the user doesn't know what to do.