I own two sig 228s and one has a laser in the spring guide. Sweet! I keep that one in the bedroom in case an intruder decides to visit late at night. All the wife needs to do it place the dot where she wants to put the shot.
I also have a sig 229 (hence.. my name.... ) and I shoot expert all the time now. I love that gun!!
The sig 239 is about the same as the 228 just slightly thinner and less rounds. I carry a Glock 26 as my backup. I shot a perfect score with the glock. Nice gun. I do not like the look of the other glocks.