I just got back from a short trip to Thailand. Rather than risk loosing it, I decided to leave my laptop back at home. There are millions of internet cafes around Bangkok (by the way, if you do go, I recommend using the cafes outside Khao San or areas like that - in khao san you will pay way more than other areas).
Anyway a big problem always seems to be that different computer setups have different Chinese displays. So on some machines my Chinese emails appear as squiggles and on others they appear correctly.
The problems can range from the version and default settings of the internet explorer (which are easy enough to change manually - unless the machine uses a foreign interface in which case you won't be able to read the menu) to the operating system and installed fonts.
There are so many different factors that it's almost pot luck! What price unicode?