I would think that it would be a slick set up. However, as always, the main problem with a light mounted weapon is the limited choice of holsters that one can find. I talked to a rep at the Eagle tactical gear booth last year. He was kind enough to explain to me all the problems that came up in trying to make holsters for weapons with accessories mounted and how sometimes the dimensions of a given light would even change a bit over a production time. For this reason - and the fact that I have a great many non railed handguns (ah, good old revolvers), I continue to rely on a light held seperate from a pistol. Well that and night vision goggles, since I *do* like my toys.
Anyway...
The advantage to the CT grips is that you can usually (I'm sure that there are exceptions) use your regular holster and still have the laser mounted as compared to a bulkier (or even non readily found) unit designed to accomodate a light/laser module.
However, you can get some light/laser combos for less than you'll pay for a pair of CT grips, let alone a pair of CT grips and a weapon light.
A lot depends on whether you like the feel of CT grips, wish to move the light/laser to other weapons, and how/if you'll carry the pistol.