My suggestion is not to buy it. I have never heard of this site, and by the looks of it, no one on TF has. The dangers of downloading s/w you don't know about, especially if you don't know much about comps, is pretty bad. If it's not a good piece of s/w, at best you'll pay for something that doesn't work. At worst, it'll be a malicious piece of s/w itself.
My computer is fitted with freeware from various companies across the internet that does their individual jobs. But, you have to manage each component yourself. If you don't want to do that, I suggest you look into packages made available by large and well-known companies such as Symantec (Norton AV guys).