I have P-239 in 9mm. It is a very nice CC pistol. I especially like the 'minimal' sized grips that are standard on the P-239.
I own several Sigs, and they do like to run 'wet'.
I use a light silicone/Teflon grease on the slide rails.
I like the P-239 for is smaller size, and my 6906 for it's larger capacity; it also has a nicer DA trigger, while the SA trigger on the P-239 is little nicer than the SA trigger on my 6906.
All semiautos have their own 'personality'.
And, I STILL want a 3913, if i could find a nice one at a reasonable price.
Many, many people seem to have discovered that the 3913 is one of the very best CCW available today.
I wish S&W would make them again. In a year or two, there would be nice shiny 'almost new' ones on the used market.