You get five stories, basically. The excerpt from Ranks of Bronxe can hardly be considered as part of the volume.
Sir George and the Dragon
Starts out extremely strong, but loses steam progressively. On one hand, Weber makes numerous shoutouts to the original - suggesting he assumes the reader must have finished it by now - but on the other, he spends a fair amount of time going over the same exposition Ranks of Bronze already made. Worse than that, Weber is either unwilling, or unable to actually paint a vivid picture of a medieval army in battle - which is what made the original so compelling. Ultimately, it's just not all that enjoyable.
Lambs to the Slaughter
Perhaps more like "The Big Fat Kill - in space!" than even typical of Drake, this is, nonetheless, a worthy addition to the Hammer's Slammers, oh excuse me, Ranks of Bronze universe. The story explores life in the legion's lower ranks and makes the distinction between warriors and soldiers even clearer. Personally, I think it's the best of the bunch, despite boasting very little in the way of novelty. Drake simply knows army life better than the others.
A Clear Signal
Mark L. Van Name
Buried deep in the book's bowels, this is a very strange story indeed. First off, it's boring, soooo boooooring. We keep switching between "action" scenes and flashes to the backstory. Thing is, they're both equally dull. Van Name must have intended for some of it to be chilling, but frankly, after the mountains of blood and guts in the previous stories (and Drake's own books), it just comes off as underwhelming. Also, it has nothing in common with Ranks of Bronze, except the universe. Just... no.
The Three Walls
Another fine illustration of Romans as a modern army with primitive weapons. We don't get much beyond the usual mass murder, but boy, do we get that... For a refreshing change, the legion doesn't stomp all over the opposition and has to earn its living. In this, Stirling has one up over the other guest writers (who remembered what the book is about). In all else, it's a pretty straightforward re-hashing of the old formula.
Carthago Delenda Est
So. Much. Praise... Sure, after everything else, it's a breath of fresh air. A new perspective on old characters, a continuation of the plot and vast, vast amounts of comedy. This one is worth reading, if only for the laughs. On the other hand, there are failings. 1. The antagonists are brutally stupid. It's amazing things lasted as long as they did, if we take Flint's word for the state of the galaxy. 2. Drake tends to sympathize with his characters, but he has no illusions about who they are and what they do. Flint's characters, on the other hand, take a giddy pleasure in killing faceless hordes - ironic, considering the story's protagonist... 3. Suspension of disbelief. It snaps. Fast. From the idiot antagonists, to the brilliant humans, to the psychotic glee with which the latter massacre the former. I was reminded of the movie Starship Troopers more than anything. Maybe, like the movie, this story was meant as satire...
Take the mean average and presto.