I am go to first time to mumbai.There, I faced a lot of trouble. main problem is, there is small parking , which is full all the time, impairment to the tourists, so my opinion is that you are not tack the car there.you are use there local transport so it is better. The weather is plasant in the evening , the cold winds blow in beach. It is quite crowed in the eveving . But the sea water is not good, it is very polluted its colour mostly black it is not good for bathing , this is too much dirt , so that is I did not like juhu beach.
Thanks