ZyXEL NAS?

Has anyone any input on the ZyXEL NAS boxes?

Specifically this one: http://www.zyxel.com/uk/en/products_services/nsa221.shtml

I have an nsa310 works much better than my old buffalo linkstation live.

£109 for 2tb which I think is great at the moment with current problems with hard drives and Thailand…