Ive been using MacSentry for a couple of years now and it's the best I've used to date. Without wishing to say anything negative about the others I've tried, Macsentry is the only one that works for me in Europe without hindrance. I also use it - and the equally notable VPN Unlimited - on my Macs.
We are a family that lives most of the year abroad, and we rely on MacSentry mainly for streaming. I've only had experience with 2 other VPN Services, which were a bit slower and were quickly blocked from the sites we use. For almost 2 years we've been using MacSentry, and we haven’t encountered a single problem. It’s extremely fast, works on all of our devices, and is well-priced!
I’ve been a MacSentry subscribe for nearly a year now and I’m overall very pleased with it. Rapid download and upload speed, super quick when it comes to connecting to servers and more importantly the VPN client doesn’t uses a lot of CPU resources. There’s a lot of bad coded OS X software these days, but MacSentry is not one of them. I don’t even recall ever crashing which is a plus. Price is fair to good.