I'll be the standout here...
Are the C.T.G.s "nice", "good" or "beneficial"? Yes. However, that said, I prefer the internal form of aiming device which replaces the guide rod. If you have a rail on your 1911, that, however does not work well.
The advantage to the Crimson Trace is the squeeze-on device. I frankly believe that the company is gouging the market for the price of $279ish. Their overhead simply cannot exceed perhaps $50.00 per device and to see profits to that extent...no thanks. JMHO.
I'll stick with my night sights and my M6 for now. When the price drops to around $200.00 for a 1911 then I'll take a more serious look. But, for those like me, who live on a budget, I can better investment such as time at the range practicing sight shooting.
Doc2005