I've rented and fired the Smith and Wesson Bodyguard at a local range that is cool enough to have a rack of pistols to rent. I've also rented and fired a Kahr PM 9 (about the same size and weight as the Smith, but in 9mm). At the very same range, I got to shoot somebody's LC9, too. I own and carry a Kahr K9 Elite, and had a Kahr CW9 (same form factor, but polymer). Also, I've put some rounds through Diamond Back 9mm, too [not recommended--saw too many reliability issues].
So, I have some experience in firing some of these mouse guns, at least enough to throw that limited experience into the fray of the interwebs.
So, I'll proceed to compare them. The Smith BG was snappy, as snappy as the Kahr PM 9 or the LC9. Tiny .380's will buck as bad as 9mm, often, because .380's are straight blow-back, where as most center fire handguns have a delayed blow-back that slows down the transfer of energy to your hand. The Smith BG had a poor trigger and printed way high and right for me (probably poor trigger control on my part combined with a poor trigger), but printed consistently so maybe it was the gun. The LC9 also had a bad trigger, but better than the BG in my opinion. I had less problems fighting the trigger, and though chambered in 9mm, the LC9 did not have as severe a recoil as the BG in my opinion. The LC9 printed better for me than the Smith, but that could be because the form factor is larger. For my $0.02, lasers are silly on any gun, but that's me. The Kahr PM9 shot the best out of all of these, but kicked as bad as the Smith (because of it's 9mm chambering). That is due to the superior double action trigger that Kahrs have.
If I were your buddy, I'd get a Kahr P380, like Kilibreaux said. They are really light at 10 oz, and are only 0.75" at the slide. I've handled them before in stores, and their trigger really compares to other Kahr products. Last time I shot my K9 Elite, fired three times and all three bullets were touching (at 15 feet). However, my K9 is an all steel frame brick that wore out a 5.11 Trainer belt in six months of daily carry. So, I, myself, am considering buying a P380. I got my CW9 (the budget version of the P9, which is the plastic version of the K9) for $350 new. If you shop around, you could probably get the budget version of the P380, the CW380, for around the same price (once prices return to normal). Get a Crossbreed, horse leather holster, IWB, and you'll be good to go. Oh yeah, and even though it's a mouse gun: GET A GOOD BELT. I'm going to go with Kydex insert full-leather "Looper" belt for my next one.
Also nice, if you want simple, the P380/CW380 have no safeties. That's about as trim as you can get. If you prefer a safety, get an LCP or an LC380. That's my not-so-humble opinion at any rate. Kahrs are pretty reliable, in my opinion. My K9 Elite is one of two fire arms that I own that have experienced zero failures, but that's with only about 800 or so rounds through it. However, I had some issues with my CW9. But I've seen no issues with my friends' T9 and CW9. I'm an unlucky dude, in general.
I'd be perfectly happy to ramble more about Kahrs if you prod me.