i looked at a few boxes from that place on ebay, and i wasn't really satisfied. they didn't have the cubic feet or the what is was tuned to so i didn't give it a second thought. if you like it you could try to find out that stuff and if it sounds good to you then get it.
Well personally I think its too small for the 15". but with winISD, it says its prefectly fine for it? I had a couple of people tlel me to build a 8 cubic feet box, but kicker says anywhere from 3 to 6? Any suggestions?