Anyone with a previous generation Xbox 360 who hasn't upgraded their hard drive should take note. Especially if you're going to be playing a lot of games on older models, which is what this hard drive is made for. As others have said, you should definitely make sure it comes with cables and a transfer CD. It's practically useless without them unless you already have them. And I doubt many people have previously bought a 120GB+ hard drive and then decided to upgrade to 250, especially with the new "slim" 360. I upgraded my hard drive from 15GB mainly because I tired of only being able to save a game along with my huge and extensive collection of rock bands. The hard drive itself appears to be the same speed as the first generation, leading me to pin it at 5400 rpm, but it still performs just as well. The one I bought wasn't reformatted though, so be sure to check it out if you're buying it used. There may be useless remnants of old information that you don't need. Overall the upgrade went very well, the transfer speed was surprisingly fast compared to USB 2.0, I expected it to take half an hour to backup my entire 13.xGB hard drive, but it only took a few minutes and I was finished. Loading times have also improved. For those who still have one of those old Xbox 360s and don't have a 250GB hard drive, you really should buy one. Microsoft and Sony say there's 5 years left for current-gen consoles, so don't worry if your investment goes down the drain. And the extra space will really do wonders for your load times. Of course, the downside of the devices is that you can't use them in the new slim 360s, but that was intentional. Microsoft wanted to make sure that, as always, you have to buy hardware new. All in all, this is a definite buy for anyone who doesn't have an Xbox 360 Slim and a decent amount of games. Boot times are reduced, temperatures are cooler, and your drives last longer because they're not spinning as hard.