AirVPN is by far the slowest VPN I have ever used. Whichever protocol and/or server I have used, it didn't make any difference. My internet speed decreased by over 90%, download speed as well as upload speed. When you take a look at the AirVPN forum, you will notice loads of users are experiencing the same issue, for which AirVPN obviously has no solutions.
Just signed up for 2 more years with AirVPN. Yes, there are other higher-rated services, but AirVPN always works perfectly and is reasonably priced. I run it on Windows, Linux, and OSX, which does limit the contenders. The main usage is secure browsing when traveling and file transfer. I like that it uses OpenVPN and also that it is NOT at the top of the list. OpenVPN is very secure and with a lower rating is unlikely to be a hacking / DOS/government target. I could go on about great AirVPN is, but really, it would be like telling you how much I like my water or electricity utility. It just works and I don't think about it more than once every two years when I need to renew my subscription.
I am working in the biggest country in Asia since 2006. I constantly use AirVpn on my MacBook Pro since 2015, and on my iPhone - iPad. I never had an issue, of any kind, with it, and I was quite amazed to read the article above. Lately, it is very difficult to get it properly run on iPhone and iPad, but this is more the result of this country where I live in restrictions than the vpn in itself. While in Hong Kong was still working fine, but as soon as I crossed the border troubles started. I will tweak that as soon as I will be out again. In the rest of the world, I never had issues. So I do not give the 5th star just because of my at present troubles using it on my iPhone and iPad. For the rest, I will stick with it.