I have one in a 1.0 cu. ft. sealed box being pushed by a 600 wpc amp. I have it in my 2010 Toyota Sienna and it hits hard, doesn't distort, and goes low. i can find no faults in its sound quality.
The sub is very efficient and in all honesty, does not need a beastly amp to drive it. Think about it; it will produce 95 decibels of sound with 1 Watt input!
I'd recommend this sub without reservation.