Ask HN: Favorite encrypted VPN provider?

I'm considering subscribing to a VPN service for increased security and privacy.

But the reviews I found are confusing and contradictory, making it very hard to pick a provider (f.ex. strongvpn.com is both "great" and "horrible". Same for perfect-privacy.com).

I trust this crowd a lot more than random online reviews, so I'd like to ask what's your fave VPN provider and why?

Ideally: Very fast using Canadian and US servers, would work well on OS X (better if doesn't require additional software), would use strong encryption, and have a solid privacy policy.

Thanks in advance for the help.