It didn't really hit me at first, but the most noticable thing was that I was using at least 50% less pedal movement, especially on approach and hover. I haven't really noticed that much more lifting performance though I must admit.
407 driver: we use A Bell 206B's and Augusta-Bell B3's. No hot and high stuff but plenty of max AUW flying and lots of pleasure flights ( 40-50 lifts a day with 4 pax) in some very interesting confined little landing sites so I would be really interested in the strakes for the 206, especially given the weak tail rotor.