I am not surprised a lot of people use Pro V's. It's the balls the 'pro's' use, so that is the ball they must use, even though they have a 20+ handicap. BS! I have used them and admit I am not pro level, but see the handicaps of others using these balls and wonder, why?
My coach says 90% of amature golfers should not use them because they lack in three catagories, swing speed, ability to hit down on the ball to generate back spin, and accuracy. Out of the 10%, only 5% actually benefit from them. This comes from Richard Binney, someone who has played on the pro tour. He had to quit because of hip problems.
I pick them up (Pro-V) along my club's OB and out of the water, most of them a 'one hit' ball. One of the best 'found' balls I use is the Bridestone B330. In my bag, I keep Wilson Zip and TX4's in my bag because of the way they feel, the distance I get out of them (same as Pro-V), and the price, not to mention my skill level. Not saying to use Wilson, but it does not make sense to me to spend big bucks on a name tag when one can actually get as good or even better results out of cheaper options. (Wilson, Top Flight, Bridgestone, etc.) Go ahead and keep using the Pro-V's if you want to, it does not affect my pocket book!