The design might be the biggest drawback of the PowerShot SD880IS. Again, it depends on your perspective. Canon seems to be bucking popular design trends. While many companies focus on sleeker and more streamlined designs, Canon went slightly bulkier and more curvaceous with the PowerShot SD880IS.
Rather than being a symmetrical and square camera, it is more rounded and bulged on the side with the controls. It also has larger and control buttons on the back. Depending on taste, this can be more comfortable and user-friendly. It could also be simply less attractive.
Likewise, it is a matter of taste, but Canon is betting that all its users want basic silver and gold, rather than the bright reds, pinks and blues of other point-and-shoot Canon models.