I have a bunch of media players in my house. The WD TS LS is my most frequently used one, but semi-frequent lockups when playing local media have me looking at a replacement. I've ordered an Xtreamer SideWinder3 which has arrived, but the firmware with media scraping is still in development, so I can't evaluate it properly yet.
I do love the WD TV LS, and it's the media player I suggest to non-techies because of it's ease of use, but for me I want something a little more robust for my local media.