Sorry, was being brief on my phone then.
Where in malaysia are you coming to?
I live in KL where there is a big expat community, but there are expats in Penang, Johor and Miri. Everywhere really!
Assuming you are coming for work, be sure to know what is included in your benefits package.
Schooling is great, but expensive. If your dc will be starting school while you are here (you say they are pre-school age now), you might want to think about looking at schools as soon as possible as many of the better international school have waiting lists, esp for the younger years.
Likewise, medical care is great but you will need private medical cover.
Areas to live, really depend on where you work.
It is a good place to live, the food and climate are great, fantastic travel and holiday opportunites. My kids were 2, 6 and 9 when we came, and are now 12, 15 and 19. (19 year old is now at uni back in the UK) - they have flourished here-they have friends from all over the world and have had a much much better education that they would have done in the UK (not putting down state school in general- just the ones they would have gone to if we'd stayed in the UK lol!)
The driving and red tape is a joke, and it is a long way from home.
People say it is child friendly, but I came with a two year old and found it frustrating I couldn't walk anywhere (storm drains, dodgy pavements with motorbikes driving along them), and preschools were full time or nothing. That was my experience though- lots of people live here with toddlers and love it.
The crime rate is rising, but I still feel safer here than I do in London. You just need to be sensible.
Happy to help with anything!