I like this technique too, as the kick almost sneaks in behind the punch. One of my old instructors used to do this, and if you didn't see it coming (you usually didn't) you usually had to choose to eat either one or the other.
However, I doubt that I have to talk about there being a million ways to time any given combination. Ah ****, I just did.
It's like biting into a juicy steak ya know that satisfying feeling, I know weird analogy lol, but yeah I love it. The kick is just devastating ya'll