I think I would have preferred the real actress instead of the CGI. As good (acceptable?) as Tarkin was, Leia was...questionable.
I thought Leia's profile was perfect but yeah, the likeness slipped when she turned and faced the camera. I probably wouldn't have minded so much if it weren't for the freaking PERFECT young RDJ we just saw in CW.
I do find that the CGI plays a little better on a smaller screen at home though, even to the point where I almost wondered if they tweaked it a bit after the theatrical release.