It is a very good expansion to the Mount & Blade series! Although the Napoleonic Wars DLC trumps this one in popularity, it is still worth the money to buy this DLC.
The Multiplayer has very few players (One or two active servers with a few dozen people) and in my opinion is ok compared to Native M&B Warband. However, there is no focus on ranged over hand-to-hand combat as both are used no matter your preference. There's archery, musketry, swords, shields, spears, crossbows, etc., etc.
The part I really like is the Singleplayer campaign, despite it being similar to the other DLCs. I just have a liking to this one in particular over the others for some reason, probably the guns (Since Mount & Blade Vanilla and Native Mount & Blade Warband don't have guns :D)
+It's one of those games that looks good and will still look good years from now.
=The occasional glitch where the ground stays put but the sky goes nuts and there's foliage and troops everywhere in the sky.
+A create your own storyline scenario where you choose what your character does and how he is seen throughout the game by others.
-Some quests aren't so great and they can get repetitive very quickly.
+Easy to learn, hard to master.
+Still unique like the past M&B games. A great blend between medieval and industrial weaponry where both are equally deadly once learned properly.
+The AI are not too hard, nor too easy. You can easily die in a 1v1 situation and can just as easily dominate against 20 people. Depends on skill for hand to hand, but marksmenship is luck mainly.
=It may be just me, but you reload at an absurdly fast rate of about 4 or 5 seconds as compared to the Napoleonic Wars DLC.
=No artillery :(My ratings, With Fire & Sword of course!8.5 out of 10