I have a 1/3 April Story male body with the 3-part torso. It definitely has its pros and cons. Pros: -allows a slightly larger variety of poses (relaxed and slouching poses are definitely easier) -aesthetics (depending on your preferences) -in my experience stability and stand-ability is still pretty good with the extra waist joint (i.e. he can still stand or sit without extra support) Cons: -the waist joint specifically was pretty clunky until I sueded it (after sueding it's actually 100x better and smoother) -the elastic is cross-strung through the pelvic section which can make for wobbly legs and poses like cross-legged sitting difficult -again, aesthetics (depending on your preferences) Overall if you don't mind the look of the waist joint and relaxed/slouching poses are important to you, then I think it's great. That being said, if you're not too fond of the look of it or slouching poses aren't a big priority for you, then you'd probably be just as pleased with your doll without it. I do enjoy having it on my AS boy, but I've found that most of the poses I have him in don't even require that extra joint. So it really depends on your aesthetic preferences and the types of poses you intend to have them in. Hope this helps!