I signed up for C+ for a year. Having the wifi hotspot in the car is cheaper for me than trying to get a tablet plan with hotspot for less. It is also cheaper than what Toyota is asking for.
As a fellow Dune owner, if you want that Quad, go for it. As you said, they are offering you $3k more than the lease pay off and all the accessories. The quad welcome package should also come with a key fob. The $1000 in self referral is gravy on top.
Personally, I am sticking with my Dune. I...