I did the Absolute 1/2 to 2/4 to PP 3/6 route, so I am not that familiar with PP 1/2 or Pokerstars 2/4, but from what I have played, it seems that PS 2/4 is a good middle step between PP 1/2 and PP 3/6. Plus the rake at Stars is quite good at 2/4--I think it is $1 at $20, $40, and $70, which is somewhat better than the Party/Prima model of $1 at $20 followed by $0.50 at $30 and $40, and is much better than sites that start raking before $20.