definitely going from hu power or the weak alpine amp I was using to this is night and day.
The HAT imagines forced me to get with the program because they were not happy at all with the alpine Amp.
I also learned not to bother with the stock hu either unless you spend a crap load on a processor. This was the first vehicle I didn't change the HU right away because it had a dvd nav hu from the factory tried that and it sounded like garbage.
Also Setting up a pickup is a lot more of a pita than a SUV or hatchback