Cons: Take it from someone who has had the WD for a week, and the Roku for about 6 months, there is no comparison. I thought "well, they make decent HDD's, so I'll try one. It cost more, but it probably is better."
Summary: Poor reception between wifi and the wd media player. For those who are looking for average to poor quality this product is for you. I returned the product to walmart did not meet just the normal standards.
Cons: I bought the WDTV Live SMP 3 days ago. It stops in the middle of a MKV or AVI (or any file) after about ten minutes, loses sound and says it is 'Unable to play the selected file' and that I should 'check the User Guide for a list of file formats'!
Summary: If you use it wired it should work okay. But wireless it is a royal pain. Error message saying content not found, long load times, sometimes up to 5 minutes. That is not acceptable, server sits 12 feet away next door. I've owned it for 2 month now, last night it gave out. It no longer works wireless. I am looking for a different brand now.
Summary: Not sure if my unit was a lemon or not, but it was VERY buggy. A few HD youtube videos would be enough for it to run out of memory, to the point that I would need to reset the unit. I bought is mainly to play my video collection, but the connection to my network was very cumbersome, and the machine oftern froze. After 2 weeks of frustration I returned it and got a Netgear NeoTV Max which so far I am very happy with.