Yeah, they need to put more work into this service for broadband users... The Xbox app was terrible when it first dropped... now it's better, but the delay is annoying and the freezing for no reason pisses me off also.
I run it on Roku and it never freezes, but the image quality isn't as good as it is on the Xbox, go figure. I run it on the Xbox, and there like a 15 second delay (or longer) and it buffers out of nowhere... even though my connection is smooth as shyt.
PC runs it the best but unless you have an HTPC you can't get it to your TV.
Oh well, it's better than nothing, and it's better than paying for cable when I know I'm not gonna watch too many other channels and I can easily find anything I want online to download.