I'm using NordVPN now; previously I used Goldenfrog VyprVPN. I read some conspiracy-style scare stories about Golden Frog (Vyper's parent company) being an FBI front (
http://cryptome.org/2014/09/giganews-fbi.htm) however they vehemently denied this (
https://www.giganews.com/blog/2014/09/it-is-a-gigahoax-giganews-is-not-an-fbi-operation.html). It's all a bit suss and frankly I wouldn't want to be using a company based in the US anyway, even with a Swiss holding company. Most importantly, they *do* log, albeit not comprehensively, but they do retain details.
Nord are a zero-logging VPN provider (
apparently confirmed by a recent audit which I've read through via my account portal), registered in Panama with a management company in Cyprus although I've no idea where they all actually live.
Some of their US and UK VPN servers are coloed with M247, which give great throughput on my line, so I'm happy. Nord's Netflix support is also a bit more stable than VyperVPN was, though sadly they only have a handful of supported Netflix countries (no German, no Australian etc).
When I had problems connecting to Netflix it turned out to be because their CDN was being clever and somehow picking up on DNS traffic vs. IP traffic. Once I changed my DNS away from 1.1.1.1 in NordVPN settings to use their own anycast DNS on the VPN, it all started working again.
Their recent desktop client update removed some useful features (server load, ability to easily add servers to favourites, and search the server list in the dropdown selection box) -- you can still use older clients according to support when I emailed with feedback. The link I was sent:
https://downloads.nordcdn.com/apps/windows/10/NordVPN/6.16.9/NordVPNSetup.exe
I have been using NordVPN for about 3-4 months. They started off well, but recently the connection stops, and after upteen emails and proposed fixes with customer support the connection only lasts about 30seconds before it stops all traffic. I've wiped windows and installed only windows and their software but it's utter pants.
I feel the 3yr service I paid for has been a complete waste of money.
I have now purchased Windscribe service for 10years at £50 and this works a treat. Speed wise it's reasonable and very easy to use software.
I'm a Nord customer and I've seen a few people with this issue as well. I had this problem on my machine but I think I actually caused it (Intel NIC settings, I'd previously adjusted settings for absolute utmost throughput and I think one of the settings conflicted with this).
To rule out their servers or your router being at fault, I'd recommend you download the OpenVPN configs for a server you've had problems with and do the OVPN setup then test with standard OpenVPN TUN. Uninstall the NordVPN client completely and also remove their own TUN adapter before installing OpenVPN.
Useful links:
DD-WRT VPN client setup tutorial:
https://nordvpn.com/tutorials/dd-wrt/openvpn-gui/ (some overlap with OpenVPN client on desktop)
OpenVPN config files:
https://nordvpn.com/ovpn/
CA certificates and PEMs available from
https://downloads.nordcdn.com/configs/archives/certificates/servers.zip
Just follow the guide from the server list,
https://nordvpn.com/servers/