They're good enough when you're getting a new console and want a free (or discounted) game with it, I suppose. I got these editions for both 2DSes I owned. Typically, much like sales on the eShop when they want to sell/promote certain games or DLC, I don't see them as much more than ways of selling old games people otherwise wouldn't want to buy anymore. Or if it's something like Tomodachi Life it can be useful for introducing new players to the mechanics of the system.
Tomodachi Life was pretty fun, though. Likely wouldn't have ever played it if it didn't come with the system. Then again, maybe it's cause I'm a sucker for free games, maybe Nintendo was able to ensnare me with their marketing trap. I don't care. It was fun, there were no other editions of the console at the time besides those with built-in games, so I bought it. Maybe there's some good to marketing schemes after all.