As somebody who has been a renter and a landlord, I feel like there will be a strong incentive for renters to either exaggerate an apartments problems, or outright lie. If your landlord is evicting you due to noise, late rent, etc., many people's natural instinct is to "get back at him" and this provides a zero risk way to do that.
Even assuming that many tenants will lie, you can ask the landlord or the broker. Now it gives them a harder choice: instead of not telling you they have to lie. Quite an improvement, IMHO.
Also, many things can be checked even without asking if you know what to look for.
