Honestly, I was trying this out as a browser-based VPN, but decided to switch from my adblock to this service exclusively. The VPN itself isn't too much to write home about considering its limits (albeit pretty generous for what they can do for free), but it gets the job done to mask your IP if that's all you want.

The privacy tab is where the five stars is coming from, for me. Their Ad-Crusher is AMAZING. I frequent sites like Mediafire, which always have annoying blocker-evading popups, and this is the first service to directly block them AND show a reason as to why (i.e. having a specific blacklist of urls and ad companies known to be redirected to from download sites like adfly or mediafire). And the Social Distancing option (remove social media tracking widgets) along with the Do Not Disturb (mute website notifications) finally gives me some goddamn peace while browsing sites that are really in your face.

This is actually a service that has useful features vanilla Firefox doesn't do (besides the option of automatic cookie deletion), and actually DOES it. 10/10.