Kind of everything! In a cheap car, one does not expect to have built in Navigation. So, in a cheap/economy car/entry level model....an aftermarket GPS unit is no big deal. In an expensive car, one expects built in Navigation.

If you had a $5 million home, would you be happy with a window unit A/C in each room? Would you be happy with a cheap Whirlpool 4 burner stove or other cheap appliances?

How much one spends on somethings, totally dictates what one expects to get, for what we all spend our VERY hard earned money on!