I used Launcher Pro Plus for months and months, then when 'Go Launcher' came out back in December I gave it a whirl.... it blew my socks off. I honestly can't remember LPP much anymore, I never looked back once installing GL. I'm now on 'Go Launcher EX' and it's pretty much just like GL only you can theme it.
Some of the things that I like better, when moving an app from one home screen to the next as soon as you pick up the app and drag it over to the edge, all of your homescreens appear so you can drop it into any home screen you want it in. Also, you can move entire home screens around just by picking them up in the multi-view mode and moving them anywhere you want them. Also, you can add up to 30 home screens if you wish (I'm up to 11 right now). Also, I have customized it so that when I swipe down on my home screen my notification bar disappears.... swipe down again for it to reappear. Swipe up and it takes me to multi-view mode.
The app drawer is totally kick ass too IMO. So anyhow, I say definately try it out. The worst that could happen is you find out you like LP better and stay with it. Or you may be like me and find out that you like 'Go Launcher' better.
Either way, you win.