First, it’s technically more more limited than rival systems from Tesla, BMW, Volvo, Mercedes and Audi, even though I liked it more.
Super Cruise works exclusively on divided highways that have been mapped by Cadillac’s mapping partner “Ushr.” It won’t engage in foul weather and it has no interest in construction zones. Simple freeway driving is all that Super Cruise will handle, while other cars will work elsewhere, even if they don’t work as well.
I had a few other problems, too.
I encountered a few stretches of road where Super Cruise refused to engage even though the road was mapped — I had Super Cruised it days before — and there was no dialogue to tell me what the problem was.