From the speed reading I done, the 2 faults or issues that seems to pop up is the light controller, and noise.
Do not put the light sensor too close to your lights. High light output damages it.
Vibration noise, different possible reasons, some seems to break in and after a while it is less noisy. Other seems to be the magnet and alignment.
For price, it is a "good" pump. Very affordable, and even if it last only 6 months, at around 70 UK pounds it is a very cheap purchase compared to Vortech MP40.