Do I like 'em? Well...yeah...sorta.
To be honest, derringers are novelty guns. I mean, they're kinda neat looking in their own way, but for all practical purposes, there are so many other guns that will do everything a derringer will do...only they'll do it a lot better.
There are guns that will not only conceal better than a derringer (i.e. smaller), but will also have greater fire power. Let's face it. With only two shots, you're not only praying for excellent shot placement, but also praying that the intended target either drops immediately or gets scared and runs away.
There are guns that are lighter weight than a derringer, and they, too, have greater fire power. The Bond derringer is heavy. I mean
real heavy figuring you only have two shots. Sure, they're built like the proverbial brick shipyard, but when you consider that they weigh 20 ounces compared to a Ruger LCP, for example, that weighs in at 9.4 ounces and packs a seven-round magazine, or a Smith and Wesson 642 that weighs 14.4 ounces, you start wondering if there really isn't a better way to go.
Do I have a derringer? You bet I do. I think they're cool, but I haven't found them real fun to shoot. I have a Bond derringer with a .38/.357 barrel. The .38 is okay, but you wouldn't want to spend a whole day at the range with it. The .357 is like getting your fingers slammed in the trunk of your car.
Anyway, that's my take on derringers. They're a novelty, but I sure wouldn't depend on one as my primary self-defense weapon.