"It does a great job at streaming videos and audio files"5.0 starson by M7a4r3k
Pros: It is designed to do one thing and one thing only - and it does it perfectly.
Cons: I have had difficulties setting up and running the wireless under WPA2-PSK. I ended running a wired connection. I think this is an issue with my router. No static IP capability. Limited user customization options. Limited documentation.
Summary: I think its funny to read another user's complaint about it not being able to access local media files. The ROKU is not a media server and I don't expect it to function in an area that it was not designed to do.
It does what it is designed to do and does it well.
Make sure to go to the ROKU site and compare the various versions and pick the one that will work for you tomorrow and not just meet your needs today.