Pricey but Worthwhile
Customer Rating: 
If you've filled (or almost filled) your Xbox 360's 20GB hard drive and you are considering this upgrade but worried about (a) how difficult it is to install, (b) how hard it is to transfer data from the old to new drive, or (c) the price, then stop worrying and buy this!
While I can't do anything about (c) except mention like many of the other reviewers that I feel it's overpriced, I can tell you that (a) and (b) are a snap. Even if you are not technically inclined, this upgrade drive is very easy to install. The transfer kit that comes with this consists of a disc and a cable and works like this:
With your old drive still attached to your XBOX, use the cable to connect the new drive and put the disc in. Follow a few simple steps and then wait for the transfer of your old data onto the new drive. Then just unclip the old drive and snap on the new one. That's it! You're done!
My primary reasons for wanting this drive were twofold--the new XBOX Experience dashboard that debuts Nov 18, and extra ROCK BAND tracks. I also have some TV shows downloaded, and of course game demos and game content. I was down to my last 3GB. Now I have a little over 90GB free!
Lastly, a couple of notes which some might find useful: the transfer kit ONLY allows you to transfer data from a small hard drive to a larger one (not vice versa), so there is no going back to your 20GB drive once you use this. Your original 20GB drive is erased and formatted as part of the upgrade process. However, your original 20GB hard drive may still be used as a storage drive after you've done the transfer/upgrade. Just like your 20GB hard drive (advertised) was only around 13GB (actual), the 120GB is more around 100GB.
Conclusion: While I agree that this is a lot to pay for a 120GB hard drive by today's market, I am certainly glad that I bought this. The included transfer kit makes the upgrade easy, and having all that free space on my XBOX gives peace of mind for future downloads.
