I havent had a chance too play any matchmaking on them , but I did get too run through them this morning . I love the setting of highlands. It gives you a Halo CE feeling of sorts. Open, human but yet a bit alien . I love how the covie are glassing as you play!
As for condemed -
It gave me a feeling of sorrow . Seeing the planet fully glassed and dead. It feels a bit......spooky lol
and since I havent played the firefight map, I cant tell you yet! Overall, the maps give you many feelings of emotion (if you are a halo fan) and give you that undescribeable feeling that halo has given many peopl (you know what im talking about!)