I haven't watched yet (mostly because I'm terrified it'll suck), but I do know Joss has said that the show really hits its stride the second half of the season. Granted, that may not have been the best way to plot out a TV show that has a small chance of doing well from the get-go, but it does give me a glimmer of hope.
Besides, if it does suck, I could always cleanse my palate with a Firefly/Serenity marathon. Shiny!