As one who had his T-series Browning Hi Power converted to the SFS configuration, I disagree with Rellascout above. I highly recommend the .40 caliber version still being sold by CDNN. Wish I could get one myself, but California law forbids it (another topic). Many well-qualified people have no problem carrying single-action pistols in Condition One -- cocked and locked. I am not one of these. Yet I do not want to carry in Condition Three (loaded magazine, empty chamber) either. Essentially, the safety on a standard Hi Power becomes, in the SFS configuration, a hammer control. You load an SFS and chamber a round, then push the hammer down. Watch the "safety" go up as you do so. To get an SFS pistol into play you do EXACTLY THE SAME THING you would with a cocked-and-locked pistol: while drawing, flip the safety/hammer control down, and commence firing SINGLE ACTION. The only difference between the two styles is where the hammer is when the gun is holstered. Also, an SFS Hi Power is much, much easier to field strip. With the regular Hi Power, one must rack the slide all the way back to remove the slide release, then release the slide -- and perhaps losing control of it. With an SFS, one simply cocks the hammer, push/pull the slide release out, and ease the slide off forward. Reassembly is just as easy.
Try the SFS version for a while. You can always order parts from several sources to convert it -- or rather regress it -- to the 1935 version.
Cordially, Jack