I really like the item. It has great utility both offensive and defensive around towers, and it's a great defensive item that covers both armor and magic resist. The lack of health on the item isn't really a downside with all the % of hp damages going around with people building BotRK or Liandry's, or just some champions, so Hp stacking is less worth. (because of that I might try it on Raka.) The hp regeneration still helps you stay healthy as well.
The split pushing aspect of it with the void bombers is kind of cool, I'm not quite sure how consistent the things are though since they seem to have a certain range they follow (but they seemed to go further the second time I paid attention to the range?) Only used the thing once though, so hard to say for sure.
Overall I like it, not sure how often I'll build it or how soon I will, but I don't have any problems with it. Like I said, I've only used it once in a bot game so actual game implementation is to be determined.