Yeah, its not good. Many of my mates tried it, and you know they have because it changes there name, makes it add a dialogue box, and also seems to affect the programs stability by making it crash alot more often.
So no....I wouldn't if I were you.
Whats even more scary though is the fact that on the website, you have to place your username and Password data on it, which on the one I had up "Keeps your details" for future reference. That should send warning bells to you straight away.