I have the IS on my 2020 North Point. The upgrade probably cost more than it should, but it is worth every penny. Your trailer will ride/handle better, be less harsh and the brakes are a bonus. You won't regret spending the money.
[2020 North Point 310RLTS : Farmhouse Interior, Solar, Goosebox, Independent Suspension, Disc Brakes, Slide Toppers, Dual Pane Windows]
[2015 RAM 3500 Crew Cab, 4x4, SRW, Cummins, 8' Bed...Basically Stock]