If you are not familiar with it, this mod basically lets you call in reinforcements at a moment's notice. Installing it provides you with a radio which, when used, allows you to summon up half a dozen or so (don't remember the exact number per call, though you can make many calls if you want) soldiers that are at your beck and call - they can be told to follow you around and fight with you, to go out in all directions and secure the area (engaging any enemies, etc), and so on.
What impressed me the most about this mod is how incredibly detailed the presentation was. These soldiers don't just pop into existence after you summon them, oh no - at first, you use the radio and just select a spot on the ground, but nothing happens immediately. Then in a few seconds, you hear the sound of a verticopter getting louder and louder, before it touches down at the spot you selected and the soldiers disembark. And they're not just any generic clones! You get to not only pick beforehand which faction you wish to summon the soldiers from (In Fallout 3, it was stuff like the Enclave, the Brotherhood of Steel, etc), but you get to pick what KIND of soldiers you want, from heavy weapons, to infantry, and so on, each with their own weapon loadout. Additionally, as I mentioned above, you could summon MULTIPLE groups of help, one after another, to get even MORE soldiers if one group wasn't enough or you had a large area to cover. There was even all sorts of extra functionality that I never got around to using, like being able to tell the soldiers to capture enemies instead of killing them, calling up air strikes, and others. It seemed, all in all, very professionally designed.
Now while this amount of firepower is certainly not conducive to maintaining the balance of the game, keeping in character and not "cheating," I certainly had a hell of a lot of fun with it - which is my goal in a game, in any case. Since I spend tons of time wandering around in a game like Fallout, finding every little secret, exploring every location, and clearing out every infestation of nasties, I often found myself in places where my first thought would be, "Oh no, I really don't want to go in there alone," often due to the presence of ghouls

Stuck in the middle of nowhere in the pitch black night with Deathclaws aprowl? Instant bodyguards so I can relax. Incredibly well fortified military base against little old me? No, it's against little old me and my 2 dozen heavily armed and armored friends! Have no idea what terrible horrors are lurking in that forboding town I just stumbled across? LOCK AND LOAD my armored pals, you've got patrolling to do! Suddenly feel the urge to declare war on an entire city? Form up behind me boys, WE'RE GOING TO WAR! (P.S. I do realize most of these are based around me being too scared to go in some place alone, but what can I say, these atmospheric games get to me!)
All in all, through the dozens and dozens of hours I spent playing Fallout 3, I came across many situations where I could use extra firepower, or at least some peace of mind, and Enclave Commander provided not only in spades, but in style. For me, and the others out there that I am sure also found much to love about this mod, I dearly hope someone will deign to create something like it for New Vegas - maybe even something better!