Yeah, it's definitely something that supplements your studies, it shouldn't be the main focus. It pays off when you read or hear something and you think "wait,

Yeah, it's definitely something that supplements your studies, it shouldn't be the main focus. It pays off when you read or hear something and you think "wait, I know that word, it means... <thing>". At first it's a bit clunky but it does speed things up massively in my experience.