depends on the place itself,some are good,some really
average.
So far have only being to places near to citisquare for food.
There is one wanton mee stall just near to the custom building
which is said to be very good and channel U even gave good reviews
bout it,but i found it to be very very normal,nothing special about
it,ate much much better wanton mee in singapore.
There was once went to a place with make shift stalls selling
normal hawker fare,it is near city square but i have forgotten how
to go there as we were recommended the place by some malaysian
friends.It is near some canal but the food there was pretty
nice,wonder if that place is still around
And well there is this place near Eve's garden hotel think jalan
ibrahim along the east coast side of johor bahru that serve really
good zi char,thou you have to go to the resturant on the right hand
side,the one on the left hand side sucks and is more expensive

Also from what i know thru recommendation from malaysian
friends,there is nice food further in like eg in skudai 777
area,yet to try out this place,maybe if have the chance should go
try it out in the future