OK, so this device has been out for nearly a year now and it hasn't been getting enough hype. If you are familiar with other adapters such as the XFPS you will know that adapters were pretty much a lost cause, and those PC gamers looking to get in on some console action won't because there isn't a solid adapter on the market.
The XIM3 is here, though, and it is phenomenal.
Being an old school PC gamer and a hardcore console gamer I really haven't had any problems with using either KB/M or controller. I am used to both. I have always understood the distinct advantage that KB/M has over controller but through research I have found no adapter that got good reviews. Then one night my friend showed me a link to the XIM3 homepage: http://www.xim3.com
Through the demonstration videos I saw how well this thing works. I basically creamed my pants and had a perma-boner. the only problem is that the XIM company was only able to make a handful of the adapters at a time so I had to wait 3 months till my order arrived (they have no supply issues now, though). THIS ADAPTER IS THE BEST PERIPHERAL EVER MADE FOR THE XBOX 360. Best $160 ever spent.
This beauty literally turns a console game into a PC game. It works with any keyboard and mouse (I use a Logitech G500 and G13) So think of it this way: You are allowed to play with the reactions of the highest sensitivity with the sensitivity of the lowest. When you watch someone with a controller play, it seems... "jittery." This is because a little analog stick doesn't have the finesse of a 1 to 1 movement the mouse offers. Watch the XIM3 videos on the homepage, especially the Reach ones. The reticule literally glues itself to the enemies.
This is my highly recommended product. If you are a PC gamer who also owns an Xbox, this is a must for you. If you don't have an Xbox because you hate controllers, this will make Xbox worth buying. If you have never played Keyboard mouse before THIS WON'T MAKE YOU A BETTER GAMER INSTANTLY. KB/M is an entirely different feel and it takes a long time to get used to. for those of you that are used to it, and have an understanding of how the game plays, it will improve your game play instantly.
Go to www.xim3.com if you want more information. I highly recommend this product.