FYI or my impressions: I and my friends also have had both types. The Drop-In Liner does allow you to be more careless when you throw heavier stuff in to the bed without as many creating dents as the Spray-In Liners. But they look cheap and after a few years they too end up with lots of scratches and gouges. They oxidize looking old way too quickly. They trap abrasive material between the drop-in liner and the truck bed. Find an older truck that has had a drop-in liner installed for a few years and lift it up. You'll see that the bed's paint has been sanded away by this trapped abrasive material in lots of places. Not good if you live in areas that salt their roadways in winter. If you're the type that just throws in stuff without thinking, this bed liner might be for you. But I and friends have dented our beds even with a drop-in liners, buy dropping and throwing heavy crap onto the beds carelessly. We all were told and believed that this would not have dented our beds. Not true. The trucks with Sprayed-In Liners all have had no rust issues. All of us have learned to be more careful how we toss material in to the truck beds, wanting to take care of the truck beds for eventual truck re-sale. Also the drop-in liners are very slick and stuff slides around in the bed. Not good either. Some people prefer the spray-in liner material because the non-slick material is rougher or have a slightly abrasive surface which prevents stuff from sliding around in the bed. Much prefered for securing bed cargos. It's still a tough decision, depending how hard you are going to use your you truck, how hard you're going to be on it, how you want it to look down the road. And of course, what kind of funds you have to invest in your truck... One more point, don't settle for one type when you really want the other... You'll always regret it down the road ! Good luck my friends...
