It is amazing how each part of the Xbox 360 is being looked at in detail to show how much thought Microsoft put into this console, and the controller is one of the devices that is getting much applause from the gaming and technical community.
Team Xbox have a review of the Controller on their site saying things like:
One of the things that we noticed when we grabbed the wireless Xbox 360 controller for the first time is how weightless it is, even with the batteries inserted. It is hard to believe until you hold each controller, but the truth is that the Xbox 360 wireless controller (with batteries) is lighter than the Xbox Controller S.
We can’t imagine how Microsoft found a way to make the previous controller even lighter without compromising the features, but somehow they found a way to make it fluffier. In fact, the quality of the materials used in the controller, from the enclosure to the different buttons and sticks, are first rate and feel much more solid than the previous controller.