I had went to so many amusement parks in Mumbai, but the one I loved is the GREAT ESCAPE Amusement park.
The things that I liked about this place are: -
1) It very big in space
2) Big water slides and of different types also
3) Infrastructure of this place is very good
4) Canteen is also very good and provides a variety of dishes to eat
5) Hygiene and safe place
Things I don't like: -
There is not a single pool with flat water level, so that you can directly jump into the water. All pools are decending to ascending water level.But, it is also safe for kids.
Overall, I would rate 8.5 out of 10 by my opinion. Its almost value for money.