I actually own one as well. This is my second decked system, had one in my 07 before i traded it in.
As a sales rep in the outdoor industry we have been building our own false floors forever. The one I had in my 07 before was roughly 300 in materials and another 300 or so in labor (if my buddy charged me for it). Wood decks are heavy, rot, dont slide smooth and offer little protection.
The decked system is perfect for me, I run a topper on my truck and pull a trailer with samples 90% of the time.
1 drawer is loaded with work items (stickers, hats, POP, hangers, etc) with the back of that drawer filled with spare clothes and emergency supplies.
Drawer 2 is full of fishing, hunting, tools, cleaning, mis. items. Everything is organized, sealed (water tight), and locked out of plain sight.
In the ammo cans I keep tow straps, gloves, reel covers, etc. The decked system will not warp in the heat or cold and can hold 2000 lbs on top of it. The quality is top notch as well, everything is a perfect fit and looks borderline factory. I dont think I have ever had my tailgate open or a drawer out without someone stopping and asking about it. A similar system from truck vault would cost upwards of $2500 and is even higher up than the decked system. Two truck vault tundra owners I know said they would buy decked next go around over truck vault.
Any other questions ask away!