I have not't been delivered by him (yet), but have been seeing him since 13 weeks into my pregnancy (coming 27 weeks now). So far I'm satisfied with Dr Tan. He's exactly the type of doctor I'm comfortable with - very jovial and optimistic, great at making people feel comfortable, answers questions thoroughly, and chats a lot yet doesn't go on & on about unnecessary things that might make the MTB paranoid.
When I was about 14 weeks pregnant, my triple test results came out and the results showed a high risk of Down's syndrome in the baby. Dr Tan was very good at explaining the results and the options I had, and seeing how stressed out I appeared, he spent some time trying to make me feel better. And he didn't even charge for that consultation, which I felt was nice of him.
Anyway, I ended up going for an amniocentesis to test for Down's syndrome, and again I was impressed by him. The procedure involves a long needle being poked into the womb and was quite painful, but he kept me distracted by chatting to me about my baby and asking me questions. It was over before I knew it. When the results came out normal he was very happy for me. In fact every time I see him he has this HUGE smile on his face. Haha. I can tell he really likes babies. I would say his best trait is making you feel positive about your pregnancy and being a new mummy, so if you want a doctor like that, stick to him.