I think it is pretty well established that the newer bonded hollowpoints tend to retain weight well when they expand, and also tend to expand more reliably than some of the older designs. The FBI has done pretty exhaustive studies on this subject. Doesn't mean the older stuff doesn't work though. I do think the FBI methodology has it exactly right though...they emphasize penetration which is really the only must have in any bullet design. The FBI requires more penetration than would you think necessary for a center mass shot, because they recognize from years of field data that people dont usually stand there and get shot...they bend, duck, have their hands and arms in the way because they are trying to shoot you as well, etc.
I think some posts above refer to Hydrashoks being known to plug up and not expand when shot through barriers like heavy clothing. Personally I don't view this as a failure, FMJs work pretty well because they are going to penetrate to the vitals. The newer bonded bullets are just an attempt to create a bullet than will retain weight well enough to penetrate more like an FMJ while still opening up to increase the size of the wound channel. Expansion is nice, but penetration is necessary, so I'd rather have an FMJ than a gimmick bullet if my life was on the line. I'd like to see this bullet shot into calibrated gelatin in the FBI protocol before I'd consider it for carry, and then see if it actually feeds reliably in my carry weapon before I'd actually carry it.
That being said, I'm all for innovation. Building a better mousetrap is how we advance things, who knows maybe this is the next advancement, I'm just wary.