Based on the performance of my 3 POCKET .380s, and ranked by dependability as experienced by me:
The Ruger LCP and S&W Bodyguard are just about tied. They've each never bobbled on any of the 90 and 95 grain JHPs I've run through them, about 300 rounds each. They've each had one failure to feed with WWB flat nosed FMJ, but that was inside the first 50 rounds for both. Since I had another LCP before this one that I gave to my son, that never had any problems, I'd have to give the slightest edge to the LCP. But I replaced the recoil spring in each LCP with a Wolff 11 lb spring. The BG380 is stock.
My Kahr P380 is now reliable with hot JHPs, but it took 1000 rounds and 3 trips back to Kahr, resulting in a new frame, to get there. I'm not the only one that had problems with my P380. Plenty of other tales on the Kahr forum.
But when it's working, it has the best sights, trigger, and accuracy of the three.
So interestingly enough, their reliability out of the box and cost were in inverse order.