No offense to anyone who likes it, but Warlock could've been ported from Halo 1 by a small Amish boy who's never seen a computer before. It's really not worth the download...
Containment's not bad, but like Warlock, shouldn't have taken so long to make. That and there's already multiple ways to get out of the two free levels. I heard that oddball in Turf is screwed up already as well, as someone can push the oddball holder into a grate with the warthog or something.
I'm cheap and only got the free ones.
Doesn't seem like Bungie really cared enough to make these maps worth the download... I mean, I probably could have done better myself and I'm FAR from a professional and definately am not using a map-making tool that I myself created.