There's a lot to like about this story, a Brig era unit story involving a villain doing some political scheming. Harry, Benton, The Brig, references to the UNIT dating controversy and UNIT's change of name in the revival. Giant Monsters!

But overall, I don't know, this story felt somewhat forgettable, and the connections back to the previous story kind of felt tacked on. In fact one of the references to said story doesn't make sense in context The Doctor saying they were sent here thanks to Rose's boyfriend an her remarking that "he's not my boyfriend", even though part of the point of that story was that Rose and Jack weren't meant to know that Mickey was there.

The teases for the next story, a new companion and Jack's backstory, seem interesting... but that's the last two pages, and cant' really give it credit for that.

So yeah, overall a story that I did really enjoy, but I think I think I should've enjoyed more than I did.