The Classic Controller Pro is Nintendo's upgrade to its existing Classic Controller. The new additions include nice grips, redesigned shoulder buttons, control sticks, and cord. The new extras do help round out the controller, but obvious problems persist.
The controller is still wired to a Wii remote in order to function. In a generation where wireless is standard, it is a nuisance and shame that Nintendo, once a pioneer in wireless controller, has limited its controller to a wire. Its not a huge deal as it doesn't affect gameplay or control in any way, but it is something worth considering for those interesting in "re-buying" a CC.
The Classic Controller launched without a rumble feature, and now the CC Pro has done the same. Since the CC is tethered to a WiiMote, and gathers its power from it, a lack of rumble is sure to safe battery life. It does take away from some of the experience however. Although it is true that Sony launched the Play Station 3 without a rumble controller, they have since released the DualShock 3 to remedy it.
Since it has no battery source of its own, or any internal mechanics to support a rumble feature, the CC Pro is very light. The plastic used is sturdy, so it doesn't feel cheap or breakable, but it does feel flimsy.
The CC Pro has a gloss on top of the controller, similar to the Wii remote, but the entire bottom of it lacks any of the gloss, OR a matte finish like the newer Wiimotes of Xbox 360 controllers.
At a cheap price of $20, it becomes obvious why the CC Pro lacks a sense of luxury, but it's disappointing that Nintendo would go through all the trouble of redesigning a controller only to do it poorly. The low price means that it isn't a serious investment, but the additions don't really warrant another purchase for those already stock full of original CCs. New comers are very welcome though.