If It Sounds Too Good To Be True...

...it usually is.

Here is an advertisement for a linux-in-a-flash-drive where you can upgrade your PC, laptop or tablet for around $25.

Xtra-PC is a small thumb drive you simply plug into your computer’s USB port and it instantly transforms your old computer to like new. It works with any computer (Mac or Windows) laptop, desktop, and netbooks made in 2004 or later and it is hands down the fastest, easiest solution to getting yourself a new computer without spending $400, $500, $800 or more – guaranteed.

IMHO you've gotta be really desperate/gullible to go for it. But I am curious.

Has anybody heard any evaluation on this?