Siddhivinayak is the most popular and most visited temple in Mumbai situated at Prabhadevi.
Accessibility is very good, you can reach Dadar local station and from west side you will get sharing taxi services till temple. It’s very crowdy on holidays and during Hindu festival season. Preferably go there in morning if you want to avoid crowd.
Local sightseeing nearby temple area multiple sweets shop, flower shops, ornament shops, you can combine Dadar market tour with Siddhivinayak temple.
Safety is no issue there, proper checking by Police and security personnel will be done before entering and all premises under CCTV coverage.
Many accomodation and restaurant facilities nearby temple.
So u advice go visit take blessings of lord Ganesha