"To be fair, these file format problems tend to plague other media-streaming products as well"
To be fair, there's really no excuse for it these days. The number of proprietary/licensable/free/open-source codec packages, handlers and streamers is legion - and we've seen very complete coverage from other, more cut-price NAS boxes and media streamers, so i'm again struggling to understand the problem here.
That said, i'm also struggling to actually find out what media formats this things support full stop, the FAQ, user manual and other documentation seem to omit any mention of it that I can find - perhaps this is something that could have been mentioned in the 'review'.
I'm not knocking the NAS capabilities of this unit (or others) but if you're going to offer media handling it really isn't too onerous a task (or expensive) to get it right.
Apart from that - sounds like quite a nice little box....