A lot of guys do rhino line inside. It gives a nice finished look with many color options and it will never wear out. If you get the floor muddy, it is much easier to clean. Just rinse with the garden hose on low so it doesn’t spalsh everywhere.
It does not muffle the sound or heat/cold as good as carpet padding. So your a/c and heater will both take longer to get you cozy. And if you have a noticeable drone in the truck, it will get a little bit worse.
The nice thing is if you do it and decide the padding and carpet was better- if you add it in on top of the coating, it will do a better job combined.