Antonio, I'm a big fan of spray-in bedliners because I have had experience with drop-ins and rust. In the early '90's I lived two years in St. Thomas, USVI. I drove a Nissan extended cab with a drop in
liner. I rinsed underneath every few months, but still, in 2 years it had several 2" to 3" diameter rust holes eaten thru the bed, particularly around the wheel wells. Admittedly, the climate is very corrosive and humid, and someone in an arrid environment shouldn't have those problems, but I was a victim of it and I could see how it could happen to others.