Knows his stuff
Can't teach his stuff
He is willing to help any student at almost any hour, if you send an email to him asking him a question about a certain topic he will get back to you by the end of the day. One of the approachable lecturers I have met at my time at Brunel.
His English skills are a huge barrier for for his lectures. Especially when there is a huge amount of content to cover(such as avionics). Not that he rushes the lecture it can just be painfully boring and difficult to pay attention when you understand most but not all words.