I use the Browsec Chrome extension which is free. It is pretty slow and only 4 servers are available (UK, USA, Singapore, Netherlands). Since I use it pretty rarely, e.g. only when I need to search for information or get access to resources that are restricted by location, I do not care much about these things. As a warning, I should tell you that they keep logs, and a couple of years ago user data was leaked from them. So as a paid version, I do not recommend it, but the free version is OK if you know what's up with the extension.
I agree with what you've written. Been using Browsec for years now. I don't really face much throttling with the free version. And I believe they certainly have a built-in kill switch as I have observed it suddenly pulling off my browser's internet connection even when my internet is perfectly okay. Yet, what I do not like is their vagueness. Earlier, they didn't really have a good explanatory website. While they now have several pages on their site, none of them explicitly explains the key features of this VPN. This isn't only a problem from the cybersecurity point of view but is also a marketing drawback. I could even bear with that (if they're happy with poor marketing, no problem with me as far as I'm getting good services). But I'm really concerned about the data logging thing. They haven't explicitly mentioned a yes or nor for it too. In short, Browsec has certainly good services to offer. But their privacy policy isn't clear. If they address these issues, then no doubt Browse would win the list of free VPNs.
I used Browsec before, and I got the chrome extension, it was pretty good for a free VPN, then I started using Browsec more and more of the time, this was the only free VPN with 256-aes-bit encryption and it was good, better than hola! VPN