professor
If I got Pro V1s for free I'd probably use them. I don't think they hurt my game, but I don't think I make enough swing speed to take advantage of their design either, so they probably don't help my game. I do know that I hit a two-piece ball a little further.
I get my golf balls "free" as well. I charge all my golf-related expenses on a Dick's Sporting Goods Mastercard so I accumulate store credit fast enough to get a $20 reward every 60 days or so. I swap it for a two-piece soft cover on-sale ball.