I have played around with it, but never got really good. Right now I'm focusing on LD and meditating.

From what I can tell, it seems to be more of a form of hypnagogic imagery, so learning to induce that would probably help, although they say if you get really good at it, you can get to the point where you can close your eyes and instantly start streaming. I would say in quality, it's probably somewhere between HI and LD.