Yeah - I'm still finishing my masters while working on a normal position. But it's really tiring and at this point I feel like I'm doing it just because I started, to be honest. You really have to enjoy this environment if you want to go all the way to MSc or higher. I would not do it again. But it's hard to know what's waiting for you before you sign up... I'm not sure how to pass that knowledge to someone else - simply saying "if you don't actually enjoy spending the evening on reading those 5 papers (or can be motivated enough to do it during the best years of your life so far), it's not for you" is not going to convince anyone, even if it's true on some level. There's just much more to it than that.

It's actually much easier to show someone what does a normal job feel like while s/he is in high school, than explaining what happens during the undergraduate studies (which can be completely different than you've ever experienced at school).