You have to remember that people are more likely to write something about a place they didn't like rather than one they did. Usually people are more passionate about things they dislike.
Also, the two worst reviews for the apartments are from people who have no other reviews, no forum posts - nothing. It makes it very difficult to judge their expectations.
When reading review of hotels I like to see what that person has written about other places as well. I read a really uncomplimentary review of a hotel in Hawaii. That same poster had complained about every hotel they had ever been to. Their main gripe was a lack of TV channels - only 10 in Hawaii apparently. Well, I stayed at the hotel and thought it was fine, but then, I wasn't in Hawaii to watch TV! And, no I didn't post a review of that one, never got around to it, must not have been passionate enough about it!
There are only 6 reviews of the place you intend to stay so I hope you will write one on your return with the good and the bad. Hopefully it turns out to be more good than bad.