Good review. I own a x2 as well. Your report pretty much sums up my initial experience with it.

I have logged 8500km on mine already. Something good to have:
http://item.taobao.com/item.htm?spm=...id=17751565957
I have one of these for my GDW saddlebags.

And a must-have:
http://item.taobao.com/item.htm?spm=...id=22994868280

This re-work of the seat really saved my butt during my last trip to Yunnan (about 3000 km). You send in your stock seat to the Taobao shop, which would add in additional foam and replace the stock cover. This is the only thing that actually works after searching around for a solution for a long time and many failed attempts.

Also, keep a close eye on the spokes, especially the rear ones. My rear rim/spokes literally fell apart after 4000 km. Replaced almost over half of them and still failing. Right now Barry and I are trying to upgrade the spokes/rim to something more decent (a Taobao shop by the name of Comstar). Currently we are struggling with the angle of the spokes, holes on the new rim, and the technique of weaving the spokes to the rim/hub, with the help from Comstar. No final resolution yet but I will keep everyone posted on its progress.