The reviewer does say that the Game play isn't great here: "This would have given players on the lower level more scope for retaliation against grenade lobbing adversaries, or those wielding railguns above more variation than pure horizontal shots. Players on the lower floor would have more to be wary of, but many of the spawn points are further up, with people only venturing down for the lightning gun and Quad damage anyway."
I guess he didn't want to say "The game play here is crap" ;)
I rarely post comments here but on this one I felt compelled to because I disagree with the review so strongly. Although most of the construction is OK it's really a below average map with poor gameplay and too many horrible shader effects.