我用的 S50, 曾经用过 300D.
我们不谈成象效果(300D肯定好).

我觉得300D手动很麻烦的样子.
比如 S50 手动的话, 调节aperture, shutter speed都十分方便和快, 都在一个 4 way button上. 调 ISO也比较的快.
在我的印象中, 300D调 aperture, shutter speed, ISO都需要按两个键(还有一个转的东东), 岂不是慢了很多?

我觉得还可以。不麻烦，习惯就好了。

坛子里有几个用300D的, 他们的感受可能深一点. rockhill呢?

never used s50. I don't think it is so troublesome for 300D. If you use aperture priority mode, the change of aperture is just turning of the wheel. If you are in Shutter priority mode the change of speed is also just the turning of the wheel.
In full manual mode, you do have to press button at the same time of turning the wheel. But I think it is quite ok.