I believe that I am probably who Bartholemew is referring to.
You can go to
www.fnhipower.com and invoke the search function for "SFS" and/or "conversion" and you'll probably find all of the threads.
I really like the SFS system. It is not so much a reflection that C&L is unsafe or that I find it disconcerting or uncomfortable, but more a reflection some of the drawbacks to the locked back hammer itself, and the usual downfalls of the safety latch. I find that the SFS system is potentially better if you CCW in dress clothes/shirt & tie as the hammer is down as well as having a lower profile spur so it absolutely does not catch on anything. It is also VERY ergonomic for shooting and moving. I find it far easier to apply the safety (i.e. you simply push the hammer forward) than to thumb up any of the thumb safeties on BHPs or 1911s I have handled to date. I also like the tactile and visual cue that the weapon is safed (the hammer is down), which is far easier for me to check while holstered than with a standard thumb safety.
Additionally, the trigger pull you get with installation of the stock SFS is excellent. It is, out of the box, one of the best combat trigger pulls I have felt. Both of my pistols measure between 4.5-5# pulls that are crisp, crisp, crisp.
One additional comment: it probably is a survivability asset. What I mean by this is that few folks are knowledgeble about the system and how it works; thus if your weapon is taken by someone who is used to DA/SA pistols it will take them a minute to figure out the safety deal. If taken by someone familiar with 1911 or SA pistols, they will think it is condition3 and try to rack, then drop safety and rack again. This buys you time to either get it back or get out of Dodge. Both of the above reactions are what I've seen when fairly experienced pistoleros handle the guns the first time.
C&S did a 10K round durability test without problems. I'm closing in on 5K through one of the guns with no problems. I learned about the SFS after shooting a friend's BHP that was so equipped. This guy has spent a good portion of his life in the IDF Special Ops community and knows the BHP better than anyone I have ever met. He has one on his carry BHP; this was quite an initial recommendation of the system for me. You should know that the Israelis carry condition 3 and need to draw and rack so condition 1 carry was not in his lexicon for the BHP.
I'd be happy to entertain any further questions. I don't work for C&S and have no commercial interest in them. I just like this system.