Hmm.. trying the url in their "Free Private Surfing" thing gives me this reply :
Unfortunately, access has been denied to the site you have requested.
So that doesn't really look too promising *lol*
Guess that's due to the free try can't be used for adult sites.. But can i be fairly sure this will work for him before i send him to spending money on it, or is there any programs like this that has a free trial he can test first before buying that you know of ?