i bought mine off ebay rather than CS. if you're interested,
this ebay auction is reliable. They are selling at US$69.00 (translating to S$99.20) with free shipping to Singapore. Registered mail costs an extra US$2.00. I paid for registered mail, the package was shipped on 2/Jan/2009, and I received on 7/Jan/2009. Singpost's fault for late delivery -- when I checked Singpost's registered article tracking, package was received by Singpost on 3/Jan, but only processed for delivery on 7/Jan.
Why i bought from ebay? Because CS sellers are selling MO (hey MO sellers, ain't it supposed to be cheaper or equivalent?!) of the same item at $110-140. Go check the prices yourself...
My comments about this grip? Well, the plastic feels solid, and the rubber "gripping pad" is of similar quality and matches the rubber "gripping pad" of the original 450D camera. I installed it with no problems, and it works fine.
The difference? The wheel is abit more recessed into the grip than the original 450D camera wheel, and it doesn't "click" as loud as the original 450D camera wheel, but the feel is good. All the buttons are sensitive enough, and the printing of the button labels is sharp.
Given the choice, I would still choose this grip, simply because for this price, I get a grip, AND 2 additional batteries. For the original canon grip, I get similar quality, but at a higher price, and no additional batteries.