I teach these now, in a CFI course, or rather I should say I demonstrate these now and let the student do one or two. We don't teach them so that our students can do them with proficiency, rather we want to expose them to what it will be like. They get to do it, but not over and over till its second nature.
150 ft min agl, 60kts min airspeed, so even then its not a 100 ft 40 knot situation. I personally will not do them from lower/slower.
No pitch pull, no pushing forward for airspeed. Thorougly briefed and demonstrated before hand so as to avoid any confusion. I do this with each CFI student I've taught and I think I would be doing them a disservice if I didn't.
If you mean a hover to forward flight then its essentially a hover auto with forward movement, you should ideally be skids aligned with movement and shouldn't pose to much of an issue.