It’s an amazing engineering feat, and because it uses less power than even the average router you can leave it on all day without worrying about your electricity bill or the environment. I’d highly recommend this as a download machine or a lightweight home server. Simply put it somewhere out of sight and have it handle your torrents. Or you can attach an external hard drive and use it to store (backups of) your files.
And if you’re running a business it may be worth considering that these machines pay for themselves. If I’d replace my current desktop PC with a Fit-PC2 it would save around $100/year on my utilities bill. It’ll run office software with ease.