Great product, replaced the junky MTX Thunderform. I put Alpine gear from Crutchfield into this box. The box is a perfect fit under my rear seat in my 2006 Dodge Ram 2500 SLT Big Horn Edition Quad Cab. There is enough room between the rear wall and the box the standard sized Alpine amp. To properly wire the subs you need to do some wire magic, there could be some improvement in that feature, but overall very pleased with the value and quality. The seat rests on the subs but there's spacers if you want to use them. I chose not to, it does not materially affect the sound. The thing thumps well.

One of the shoes I got is somewhat defective. One is harder to clip out of than the other one. I also had to replace the sole with a better sole. Not the best quality sole it comes with.