I just switched 2 months ago. The reason i came to switching was because i have been using a 4 3/8 grip size when i need a 4 1/2 so i was gonna but new PST's off the forum. I decided that since ill be selling mine i sould try out a few other racquets to be sure i want to stick with it... MicroGel prestige pro=didnt like it all that much, but still pretty good.
Then i came to the PSL, always wanted to try it out cause the specs seemed perfect compared to the PST...a little more head light, slightly smaller head, thinner beam. All seemed perfect except for the 18x20 string pattern which are not my favorite due to the loss of spin. But i gave it a try anyways and i loved it... Sure i did lose spin but the amazing control seemed to make up for it. And that is why i came to getting a reel of tour bit...for the extra spin.
oh hah i forgot that i actually created a post reviewing my switch to the PSL
http://tt.tennis-warehouse.com/showthread.php?t=310855
review starts at post #20
btw if your even thinking about it switching...the non GT limited is a lot better than the Gt version. The Gt takes away all the feel and just feels dead and harsh.