I just got my box installed and hooked up. It sounds great. Just make sure you remove the tie down braket on the support brace when you install the box, otherwise it wont lay flat. I must say that this box paired with the JBL sub sounds awesome in the Z.
Only downside is that there is no way to tie it down. It would be nice it the edges had a simple way to secure the box at the edges where the foam pieces are. The thought of that bulky box flying around the cab in an accident is a bit unsettling.
Other than this, great looking/sounding product which is very well made.
Thanks to Wicked for finally being able to get this product out to the sport/Nismo guys when nobody else did.