I play the ProV1 because I got a great deal on them. 20$/dzn closeout on the 2011 balls, so I picked up the last 8 boxes they had. Season started a month ago here, and im still on my first box. I lost four, 5 have been relegated to practice balls due to being beat up by regular use. I imagine that I will be playing these balls all season, with the odd sleeve of Penta's, because I picked up a box of them with my new bag last week. And no doubt I will buy a sleeve of other balls to try here and there. Plan on playing a Sleeve of Penta's when this box of ProV1's are gone, though i've been thinking I may try them tomorrow as wel l. Both are new balls to me for regular use. Last few years I played Callaways, Srixons (which I enjoyed), and Bridgestones. I notice a real difference around the greens, as well as when putting. But off the driver I only notice the diference with really cheap balls like Intech.