I have a rocket serve, and strings are still good as new from what i see. Not sure why original strings are always so good. Okay i noticed when i got this racket, i could serve wide, and down the middle better. I think it did take 5 mph off my serve, but thought it was worth it. What racket is best for serve and hitting a slice drop shot over the net to make the server run to the net . Im good at doing this but inconsistent, sometimes i hit a clunker like i was hitting a brick and it will hit the top of the tape or sometimes i hit it too far deep and he just runs up and gets it for an easy winner.