Looks cool. But it seems like it's just somebody else's server acting as a proxy for you, right? So I'd want to know the same things about them that I'd ask of any proxy service. Where are their servers? Do they keep logs? What's their privacy policy?
Regarding it being free, I see that they're serving ads and asking for donations. So the service clearly costs money to run. I doubt it stays free forever, and I hope those servers aren't US based. 😬