[why5s]

Don't landlords more or less already have access to this via credit scores, background checks etc? I don't think there's a reasonable equivalent to this for tenants.

[bombcar]

It's exactly what they have access to, though the landlord will usually be looking at credit to determine the tenant has a job and can pay, the background check is more useful to see if they have any tenant/landlord civil suits in their history.

[Varqu]

Generally the more transparency there is on both sides, the better:

This way, the market can punish bad behaviors (abusive landlords / problematic tenants) and reward those who act properly.