Hello, Can anyone recommend the Mandarin classes for adults?

I took conversational Mandarin classes briefly at Stanford Language Centre at Peninsula Plaza. I enjoyed the classes and I reckon I learnt quite a bit. There's a promotion price going on, $178 for 10 classes and this lasts till 31 Aug 2016 -- do grab it before it's too late :) http://www.stanford.com.sg/Promo150.html