Mainland China in Andheri east is a really good Chinese restaurant. The food tastes good and the prices arent sky high. I mean the prices are pretty decent if you intend to indulge once every 15 days. I have also taken visitors there and they have loved it, which means more browny points. The best thing I like about this restaurant is that they keep changing the menu at regular intervals.
This means that even though I have been there almost every month for the last 3 years, I am yet to repeat a dish. The taste is really good if you want to try non-Indianian Chinese food. It is not a completely oriental experience for the taste buds, which I personally do not like, but still significantly different from indo-chinese cuisine. Skip the non-veg rice though. Instead order the veg-rice and a non veg entre/dish. Give it a go and you wont regret it.