I found the EVA700 was able to handle a good deal of my media collection. The fact that it used the UPnP AV standard was a definite bonus for people like me that like to use NAS devices to handle their digital media libraries. I was also pleased to find that the device was compatible with the Wizd servers I run on my network. This compatibility meant that the EVA700 can play back ripped DVDs and provide music to go along with my picture slide shows.
The EVA700 fell a bit short in the standard user interface, however. Although everything worked, the interface was bland. Other boxes I've reviewed recently, like the D-Link DSM-520, have a much more modern-looking user interface and nice features such as photo thumbnails for its photo menu. On the other hand, the DSM-520 had its own problems including its failure to play my music files that included album art.
In general, it has been my experience with all networked media adapters is that none of them can flawlessly handle the huge range of media formats in use today. Each device has its advantages and disadvantages and the one that's right for you depends on the files in your collection along with your personal preferences and needs.
In my case, I'd go for the EVA700 over D-Link's DSM-520 due to the EVA's support for the Wizd server and the additional features Wizd provides. The real deal-killer for the DSM, however, is that it failed to play the bulk of my mp3s due to the album-art issue. I'd rather be able to listen to my music without seeing the album cover than not be able to listen at all!