Question#1........yes, single action trigger pull is lighter than double action. Some like the fact of lighter trigger pull, but single action firearms require either pulling the firearm and cocking it, or carrying cocked with safety on, which requires release of the safety to fire. Double action firearms may be pulled and if you carry without the safety on, will be ready to fire immediately. The longer heavier pull of a double action only firearm, is a type of safety measure, to make it harder for an accidental discharge. If you carry your DAO only firearm in a proper holster, chances of discharge are lessened to a large degree. I have handled all three firearms, and own a Bodyguard, which is my carry firearm. I think that all three choices are good, depending on what you are comfortable with. Personally, I don't like cock and lock firearms ie. P238......I sacrifice trigger pull for safety. I also like my firearm to be ready immediately, with out having to cock it, or release a safety first. I have read of problems with all three firearms, but for the most part, I don't feel that any of these problems were widespread.The Bodyguard had some problems in early production, like a lot of other firearms, but they have since resolved the issues for the most part. I have had no issues with my Bodyguard, and it has functioned fine. It is built a bit better than other "mouse" guns, and is a firearm, like the others, for 15 yds. or less. In thst capacity, it has done what I expected. All three are good choices, I just prefer the Bodyguard, out of the three.