Perhaps I am biased because I've been coming here since I was a small child but I love this place. In my opinion, you are not a true Richmond Hill HK-er if you haven't been here at least once.
Portions can be small but you're paying 5 bucks for a bowl of noodles, so you can't complain. I love the iced lemon tea here - some places just don't do it right. I've made a convert out of my boyfriend, who now also adores this place. Nothing you get here will be bad. The only thing I will say is that their HK-style french toast is quite thin relative to other cha chaang tengs.
I get that the lady-boss of this cafe can be quite loud. However, I've known her since I was really really young and she's as sweet as they come if you get to know her. And everyone's super friendly!