True but as ling as you read the reviews knowing that then You can use them to compare to one another. ie Your looking at two places, one has complaints about the shower taking too long to warm up while the other has complaints about the basement flooding once a month.
And in general, I'm more interested in the complaints anyway. "Great place to live, landlord quick to respond, quiet street" is a lot less useful to me than "TOILET SPEWS ROACHES EVERY TUESDAY AT 3PM".