I bought this thing to keep my stuff dry and relatively safe in the back of my truck. I went with the X4S without the Tslot rail system because i am going on a camping/road trip in a week and the X4ts was going to take 2+ weeks to arrive. I am happy that this leaves the 3 mounting hard points on each bedrail accessible for future bed rack install.

The little end caps came broken on my cover which was a bummer but RealTruck.com already put in the ticket to ship out new caps for me at no cost.