I have The ONE, it has about 175 games on it. There has been no loss of overall hook in the ball. It is a bit earlier and smoother off the turn now than when I first bought it. I have not resurfaced the ball, but I do keep it clean, use Energizer Ball cleaner after every set, warm water baths after every 30 games or so. I repolish it by hand with Ebonite Factory Finish Polish after every other bath session. The ball is a bit duller now than the original factory finish, I didn't realize how much duller it has become until last week, when a bowler on the other team pulled out his much newer The One.
I was considering doing a resurface job on it, but I am still happy with its overall reaction, so I'm holding off on doing that until the end of the season.
I have a good friend who has been using a Big One exclusively since it first came out. His ball still hooks quite a bit for him, but not as much as my One does. He has higher ball speed, but I have a higher rev rate. He doesn't work as hard as I do with cleaning and maintenance on his ball, he cleans his on an irregular basis.
The balls should last for you provided that you take the time to maintain them properly.
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"Beer is proof that God loves us and wants us to be happy." Ben Franklin

Enjoy,
Bob