Anyone had any experience with MySource Matrix?

[harmonysteel]

A government client of mine wants to use this CMS but I've never encountered it before - was wondering if anyone here has worked with this one before and can tell me what it's like? More specifically:

• Is it user-friendly for clients?
• Is it user-friendly for designers / easy enough to set up and modify templates and modules?
• Or is it a pure-developer product I'll need to outsource for?

http://matrix.squiz.net/

Thanks heaps
Harmony