Yes, I just saw it. We missed it in the theatres (for reasons that have more to do with Serenity than anything else) and we saw it this weekend.
It was surprisingly decent. It had a plot, maybe not the most inventive plot ever, but still it was coherent, which is something. It brought it many elements of the TV show.
Trevor was not as skeevy as the Trevor of the TV show, which was a nice change, even if I know I should hate it just because it was a change.
It was a fun little romp. The changes weren't changes for the sake of changes, but rather for plot, and to make Trevor more of the tortured hero type. Other removing his more unappealing characteristics to his brother, he was fairly true and they did a very good job trying to capture some of the signature moments of the TV show.