Recommend Multi-lingual plugin?

Hi,
I’ve been asked to help someone set up a blog that supports both English and Chinese, and I’ve been poking around the plugin directory and found 3 viable candidates. I was wondering if anyone had any first hand experience with any of these:

• WP Multilingual CMS
• xLanguage
• or qTranslate

If anyone has any feedback on any of these, positive or negative, I would really appreciate it.