It may be too soon to tell quite how you feel about Google+, but let me tell you right now: the new Google Calendar look is love at first sight. Clean, smooth, sparse—it's everything we've ever loved about Google's UI, coming out just at a time when the rest of its properties get more cluttered by the day.
It hasn't rolled out to everyone yet, but to start using the new design just click on "Try the new look" in the upper righthand corner, next to the Settings tab. [Google Calendar]