I've been to Ngo & Sons a while back (2016) and I remember it being really good. Yes, my first time was scary and after Dr Truong spoke to us I was really nervous. However my mum was adamant so I tried it out. And boy I was wrong. They are strict, yes, but this is strictness out of respect. We call our tutors Sir or Miss, just like how we don't call our mums and dad by their first name.
I was in the Yr 9 accelerated class and I had Sir and Mr Mai. I thought I was done for but they were really chill and motivated me through their life stories. Even though I went onto acheive a state rank in 2U and acheive high 90s for 3U and 4U, I think the most important part they changed was my mindset. That if I truly put my mind to it, anything is possible.
So looking back now, Ngo & Sons is a good place, I really enjoyed the techniques I've learnt (and all the jokes in class). But at the end of the day, it's also about how much you're willing to put in. No tutoring place will help if you are lazy, unmotivated or uncommitted.
Sir, if you ever read this, I know this was 4 years too late, but I just want to say thank you!!