I bought one after a long search for a PRS-350 for a reasonable price AND reasonable condition ended with nothing.
I like it, tiny, but with a big enough bezel to actually hold it (gripe on my prs-T1 I just gave to my wife), light enough to hold with 2 fingers (unlike prs-300).
No downsides I care about.
Just need a slip cover now, wish they just included one...