Is there any reason to buy Playa over the relationship module? I have a fairly complex relationship setup and need something to assist. Playa looks good but does it offer anything the native relationship module does not?
This is why I buy Playa, from the relationship field docs :
Currently it is not possible to get the parents of a relationship field that is inside of a Grid field. You can also not use Relationships inside of a Grid field that does not store Channel data.