I have a few tennis partners, 4.0-5.0 level, and let them hit with my racket for a little to see how they would play. The player with the best technique (at least 5.0) adjusted very well and said the frame was excellent on all shots. The 4.0 player, with decent but not excellent technique, struggled with consistency and power, and didn't like it at all. I realize one can't generalize just from a couple of players, but it did confirm my suspicion that those with anything less than good mechanics on all shots will have trouble playing well with the midsize. But I am convinced that for advanced players, this frame has no limits, like the PS6.0 or Prestige.