Total legend. In sixthform especially has some great random physics digressions.
I think he's quite cool! We ask him random questions that sometimes go completely off the subject, but it's fun. And his little cough and shiver is so sweet! But it can be a little anoying at times...
True, if you want to learn, you will do well. If not, you won't be learning much.
he's good, if you want to learn the subject. if you don't, he's very boring.