Can't speak for the 2812, but I am happy with the 4100. Heartland customer service has been great. They have stepped up several times when the dealer failed, and made everything right. They have even shipped equipment and parts to me direct, so I didn't have to make the 120 mi r/t to drop off and later pick up my rig. I decided after my rig was at the dealer for 6 weeks to repair an electrical problem that they had created themselves on a previous service, that I would make any repairs myself, that are within my abilities. All of my issues have been 3rd party equipment so far.
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2014 F150 4x4 Crew Cab Platinum 157" WB
Roadmaster Blackhawk 2, RVI2 Brake System