I've seen that many people bash Unbound's OST pretty harshly when I used Reddit. I can see their reasoning but I think it's definitely over-dramatized than it should be. Of course, the OST has SOME trashy songs (ex: Money), but most of the songs can really give you the vibe (ex: Wish you well, Hey neighbor!, The God Hour). I would definitely put Unbound into Good if they would have provided more fast-rhythm songs and put the slower ones into free roam and garage (most of them are too slow to me).
EDIT: Without caring for the adrenaline feeling while racing it's more catchy than Payback and The Run.
