I felt more focused and, importantly, less prone to anxiety and depression, without the unstable skittishness that, say, caffeine gives me. (That said, it made my pee smell rather funky!)
This is my experience too. My first order of Modafinil was actually an afterthought tacked on to an order of Propranalol (after deciding I'd had enough of being stunted by anxiety). It turned out that the Modafinil was way more effective than the Propranalol, although this is no longer the case for me. After an extended period of taking Modafinil, I find that my heart rate increases too much when I'm anxious. Not quite sure what caused this shift (could be tolerance, or my guess is heightened awareness of the effects after taking it for so long). However, taking Modafinil with Propranalol works wonders. Funky pee be damned!