Shawn
I agree wholeheartly about rrpm, but in any helicopter you need airspeed so you have something to flare with at the bottom, espically an R22
A question to you if you owned a brand new helicopter would you sit at the duals and ask a low time pilot to do an engine off landing with 20 kt airspeed or 60 kts airspeed. If the answer is the former you are very brave and risk bending the ac and yourself if there is the slightest missjudgement.
My point is that yes rrpm is life down to close to the ground, but airspeed so you can flare will probably mean a less experienced pilot will walk away !