Having tried some UFO, all I can say is it meets all the requirements Valentino's has stated for it and it is as good as all their other products.
While it easily adds 3-4 feet of length, it also reduces the backend and overall hook allowing you to play where you did before the lanes started to break down. Practically speaking you could have 2 of the same ball drilled alike and when you move too deep with the "plain" or untreated ball, you virtually move back to where you were with the ball treated with UFO. I've got to try that one myself.
And it was easy to remove, precisely as Kevin mentioned above: a 1-2-3 treatement with Resurrection and you're back to "normal".
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"None are so blind as those who will not see."