I live in KL
Fire away with questions
Crime is on the rise and we recently made the top ten dangerous cities in the world, which is alarming, but honestly I don't think it is any more dangerous that London or any other big city as long as you are sensible.
People's main concerns are house break ins, so you might want to consider living in an apartment with good security or one of the gated communities if that is a concern for you.
I have lived in stand alone houses for 10 years (3 houses in two different areas and never had a problem)
Snatch theft in the street is also a concern, but again, be sensible. Don't carry more in your bag than you need, put keys on your pocket if you can and don't talk on a flash phone while walking along the street.
One the plus side, education is good (I know your kids are little but you will be thinking about preschools in the next year or so) but expensive so you need to be on a good package.
Medical care the same
You'll be paying RM8000-12000 for a four bed appartment or house in a "nice" part of town.
Driving is mental, but you do get used to it.
You can get most things here, but imported stuff is expensive (if you shop at local markets, groceries can be very cheap)
English is widely spoken.
My kids are older (15 and 12) and they have missed out a bit on personal freedom (they can't just hop on a bus to see friends), but on balance I think it is a good place to grow up.
Good hub for local travel-have been to cambodia, vietnam, Singapore, Bali, Australia
It's a long way to get home (my best time is 20 hours door to door!)
Anything else I can help with? I think you would find it easier to live than Korea. I have have a friend who went from KL to Seoul and struggled.