Box looks and sounds great!
I went with a pair of Arc Audio A10s and they fit perfectly and sound really good in this box. Box is very well built, packaging was second to none, and it arrived quickly.
I did seal off the end speaker terminals and run wiring out the back to some XT60 inline connectors. But that is personal choice and wasn't necessary. The included terminals would work and once fully installed I realize how little wiring would have been seen if you run the wire up and toward the back, like at 10:00 or 2:00. Looks like the seat has room to tuck the wires in under there and you'd only see a few inched of them on the side. But side terminals are the only thing I would change, but I also understand why they didn't move them as part of the design There really isn't any other place to put terminals like that on the box without having the seats press on them.
I did have the auto stop/start power inverter under my seat. Although it is stated that this box would not work with it, I took a chance and it worked out fine. I was able to shift the inverter behind the box with a few strategic cuts to the carpeting. I never unplugged it to do so since I read elsewhere that unplugging could trigger a CEL, but I don't know that as a fact. When closing the seat it has to start out a little forward to get the seat past it's edge, but then push the box in behind it to seat it. Be aware of how the wiring is positioned and that it isn't getting pinched, but once in it holds tight.
The one picture shows how the box fits along the seat. This side is forced out maybe a half inch more than the other by the power inverter stuffed where I have it. I looked for a picture showing these angles before ordering but couldn't find anything, so here they are for others.
Front edge sticks past the seat about one finger width when installed. Both of my seats do fully lock down with some minor pressing, and the box seems to be locked down well by the seats. When sitting in the seats for testing I can't feel any hot spots of the enclosure. It's a really good design and maximizes the box cuft volume we can achieve under these seats.
I definitely would recommend this Fox Acoustics box and the company in general!