I’ve noticed the battery life reduction as well on my iPhone but no more than I’d expect from any other vpn, but it still goes all day unless I’m using my device a lot more than normal

It’s seemed perfectly serviceable on the latest version of Mint. I’m not a real deep dive tester on everything but it notifies me when I’ve got mail and I can do the basics in the app. I don’t have any complaints but I’m no power user