I've really enjoyed the last two ISF. Very useful for guys like me still starting out.

One question, which you somewhat address. How much do you need to play, or how much/regular do your opponents need to play, in order for things like manipulating your own range to play a big part? I mean, if you're at a table of people you've never seen before, probably wont see again, and will probably only play at most a couple hundred hands v's them, then is there enough/any value in these concepts?