Most services provide perfectly adequate internet speed when in use, and can even handle streaming HD video. However, 4K video and other data-intensive tasks like gaming over a VPN are another story. Some VPN services, such as NordVPN, have started to roll out specialty servers for high-bandwidth activities. And nearly every service we have tested includes a tool to connect you with the fastest available network. Of course, you can always limit your VPN use to when you're not on a trusted network.
They even offer the most generous simultaneous connection count, with six simultaneous connections through their network, where everyone else offers five or fewer. NordVPN's network isn't as large as some of their competitors, so if you're trying to obfuscate your tracks, you might want a company with more servers. Otherwise, this company is clearly providing a winning offering.