I'd have to agree totally with the last bit of the first post. Coming from the US/Canada some things here are very, very expensive--apartments, cars, clothes, some food, energy, even transport if you really think about it.
If you're negotiating from the US, be very clear about what the housing allowance will be. We totally underestimated on housing and as I'm on a local package more of our income goes toward that than we expected. It's a huge pain and we've begun thinking maybe it's not as much fun as we thought. Our standard of living is hugely different here than in the US, and I'm not making peanuts either.
Just be careful when you're sitting down to write out the pro and con of taking a position. How much does it mean to take a "real" vacation versus just taking the bus to KL? Does your kid like certain foods only "expat" stores sell? How often will you have to run away from the Hawker place to eat (we eat our almost everyday--80% at the hawkers in our building) out? And if you ike new clothes, prepare to spend at least 50-100% more. My two cents.