Received the box on Friday and installed yesterday. I'm coming from a 10" Zenclosures rear firing box...and have to say the change is dramatic.
HUGE weight savings and I have my trunk back, so to speak. Acoustically I feel the bass significantly more as well. My wife even agreed...which tells you something
Only issues I had were having to enlarge the cutout a bit to fit my woofer...but that's better than being too large. I also needed to add a little foam to get the woofer to fit snug in the corner. Overall...relatively minor issues.
I HIGHLY recommend this box and will post up pics when I get a chance.