I must say my first impression was, quite frankly, "bleh, I don't like it at all", but if the subject was "prosilver style: second impressions"
that's a different story.
Most of my doubts are the same as those that have been brought up repeatedly throughout the thread (eg. mini profile on right, fixed width, subject font too large).
The biggest thing this theme has going for it though, IMHO, is that, if indeed it is entirely CSS based, it will be an extremely adaptable theme. (I like when I see comments such as "it only takes 2 lines of CSS to change"
I mean seriously, how many of you actually keep your forum looking like the default theme that ships with the product? I certainly don't, and my personal feeling is it's a bad idea to do so if your wanting to project a feeling of "my forum is not like anyone else's".