As an owner of WDTV 1, I really find only two things problematic with it:
1) DTS downmix: in my case, not really a problem since I use a receiver; and
2) the isolated problem of an unresponsive remote, because of conflict with some settings on my Panasonic Plasma. From what I've read, it's a physical/hardware design flaw, but applying electrical tape to the WD TV resolves the problem. (I hope this is solved in WD TV Live).
All the other feature requests in the link I can actually live without, for a product that's designed to be cheap and simple.
In my experience, I've had more teething problems out of the box with my realtek player (but now it's somewhat working well as well, for what I bought it for: a movie player.
).