Kenwood subs? good or bad??

I've not heard these particular subs but just the other day we had a customer with two 12" kenwood subs (not sure which model number but they weren't anything too fancy).  They hit pretty hard though and I was kinda surprised actually at how good they sounded.

Main thing to make sure about is selecting an enclosure that is the ideal size/type recommended by kenwood, and that it's a good solid enclosure.  And of course make sure it's properly installed and the amplifier powering the sub(s) has sufficient power output and that it's adjusted properly (low-pass x-over frequency, gain, bass boost, etc.