Very well built and professionally looking. Plays deep with a punch, although a bit tough on the power amp. Built in passive crossover at 160hz seems a bit high, Found the best split (with EV SX300 fullrange-tops) at around 120hz. 
 
Lightweight, stackable and solid. 
 
Minor comlaint is that the ports are not mounted in a "wedge" so you can't place the back of the woofer directly against a wall, if that would be neccessary due to space restraints. 
 
Either way, very impressed with the sound and the build quality