After my lifelong Pro Staff usage (PS85 --> PST90 --> K90 --> KPS88 -- k90... I have now settled back on the PST... and all I have to say is that I'm staying put. I love the PS line, and have always had a heavier frame (my K90's were similar specs to my KPS88's) But now that I'm getting up in age (44) I found that getting the 88 or leaded up K90 over the top for serves, etc., especially late in matches just wasnt cutting it any more. I know, I could go back to stock k90... but the PST gives that little more - great off groundies, at the net, and serves are fantastic. Anyone else landed at the same conclusion?