Others say...

"Buy this controller if you love to LOSE!"
The controller itself is made of decent quality. The sticks are accurate and recenter themselves well, the analog shoulder buttons have a nice tactile feel, and the buttons are responsive and not mushy. HOWEVER, Logitard was smart enough to put a sleep mode function into the controller. So, if you're playing a game where you switch between keyboard and controller (BF2 for example) and it's been 10 minutes or so since you've used the controller. When you goto use the controller you'll quickly realize that the controller is asleep! What makes it even better is that you have to COMPLETELY exit the game and restart to get the game to recognize the controller. And there's nothing better than have 10 guys yell at you over TS because you have to restart the game in the middle of a match.
Go Logitard!

"Very Impressed, but no NES"
I was playing Super Mario emulated on my laptop a few months back when my wife (then fiancée) came in and exclaimed, "Super Mario! I want to play!" I needed a new controller and, needless to say, my wife needed one as well. I started looking around for something that'd do the job and last us a while. To my surprise, I found that the quality on game pads is lacking. For a while, the best reviewed game pad I could find was another Logitech and the left analog stick commonly had "floating" issues (the stick would cause you to drift down) after pretty light use. This is apparently pretty common for all Logitech controllers.

I then found this controller and felt like the fan was a bit of a joke, but since it is a bit more expensive and so clearly geared toward XBOX gamers, I felt like it aught to be at least a little more resilient and ready for someone who knows what a decent controller aught to feel like.

So, when I purchased two of these, my primary concerns were that the left analog stick would begin to float and that the airflow would be pointless and maybe a little annoying if it accidentally got turned on. After about 3 months of average use, the analog stick is fine and, very much to my surprise, I absolutely love the airflow on my palms. Over the summer I actually wished I could get a little more airflow out of it, but I expect that over the winter, the low setting will be just right.

The only disappointing thing I've found with the controller so far is this: In Mario 3 there's a particular level (one of my favorites, actually) in which you must fly while holding shell. To do this, you have to use what I call the B, A+ move which involves pressing and holding the B button with the tip of your thumb while repeatedly hitting the A button with the meat of your thumb. I have no problems doing this on a classic NES controller, my old (terrible) Saitek P150 and I've also done the same with the GameBoy where the buttons are angled the wrong way. I can't, however, do this on the ChillStream using the X and A buttons as B and A respectively. I have to change hand positions to use the tips of my index and middle finger to do it well enough to pass the level.

"Works OK"
It generally works, however you are stuck with the standard Windows drivers which are not re-mappable. I've been using it to play some gametap games and it has worked for all. Some keys can't be mapped in various windows games which is disappointing. The back "trigger" buttons are axis controls, so you can't use them as normal keys. Sometimes the keys act screwey in the some of the emulated Gametap keys B becomes A or A becomes B. It could be a Gametap problem though and is easily correctable. The two triggers can be depressed for more available keys.

The fan is actually quieter on high, mine kind of rattles on low so I just leave it on high. Being hot-blooded it doesn't keep my palms completely dry but its way better than my razor diamondback!

I'm giving this a 3/5, mostly due to the lame windows drivers they used and because they only included a 6ft cable. Also, the big Vista key can't be used for anything. I've read that you have to buy a "Game for Vista" to even be able to map it to a function, all the manual says is consult Vista/Game documentation. If I could map it to Gametap, I would be much happier with this product. If the XBOX360 controller was more competitively priced, I would have bought it instead. $65+$20 receiver for a rechargeable wireless XBOX360 controller? No thanks, this controller works just fine!

"Great controller"
Decided on this controller instead of the original xbox 360 one because of the fan for cooling. Buttons and fan work great. Had this for over 2 months and still working perfect. Thumbs up to logitech for another amazing product.

"Long hous of playing will be cool"
Easy to set up, very acurate almost like cheating the games (playing the NFS series).