I sometimes carry my Kimber 1911. I like having the firing pin safety.
I have never had a problem caused by the Kimber firing pin safety.
http://shadowspear.com/vb/showthread...n-Yam&p=328268
"Firing pin safeties typically fall into the Colt Series 80 pattern which are actuated by the trigger (Colt Series 80, Para Ordnance, Sig GSR) and the Swartz style safety which is actuated by the grip safety (Kimber, Smith & Wesson). Of all the firing pin safety mechanisms on the market, the original Colt Series 80 - in a Colt - is the most reliable of them all. The platforms utilizing the Swartz safety are a less than ideal choice across the board due to the inherent reliability problems of the design. The Swartz safety is extremely sensitive to the fit of the grip safety to the frame and the timing of the grip safety's trigger blocking arm. Tolerance issues can also lead to a Swartz safety that will time properly when the grip safety is depressed a certain way, and time differently when depressed a different way. This will typically be a product of loose fit of the grip safety to the frame tangs and/or loose fit of the thumb safety shaft through the grip safety. It is possible to have the grip safety timed such that the trigger will be able to release the sear well before the firing pin safety plunger has been moved far enough to clear the firing pin. Problems with improper timing of the Swartz safeties can lead to a situation where you get a "click" when you wanted a "bang." That's a serious problem. Unless department policy mandates a firing pin safety, I would choose a 1911 without one. It is possible to have a drop safe 1911 without the firing pin safety, and given the potential reliability problems with a poorly executed system, the perceived risk of drop safety is outweighed by the real risk of a failure to fire. "