I'm experimenting and looking for better and more durable tennis balls. Just bought 4 cans of the new Slazenger Extra Life ball (It's basically a new, slightly heavier and improved Wimbledon UltraVis ball with better durability), 4 cans of the improved Babolat VS N2 ball and also 4 cans of the Tecnifibre X-One Special Editon DTF version in a can with a new design (FYI !! the X-One Red, that TW EUROPE sells is 2. grade quality and not on par with the X-One Special Edition DTF ball) So have any of you guys tested any of these balls and if so, what do you think ? Tried Wilson US OPEN, Wilson Australien Open and Wilson Tour Davies Cup - but simply do not like Wilson balls. Same with the Head Atp Tour ball - not a great ball in my view. Have tried all the different Penn balls, and they all suck compared to the 3 in question - SLAZENGER EXTRA LIFE, Babolat VS N2 & Tecnifibre X-One Special Editon DTF. I find the new Slazenger EXTRA LIFE to be a bit more heavy, but still with nice pop and very easy to see and the felt stays on for a long time. The Babolat VS N2 is a lighter ball, but also with improved durability and very nice to play with on slower surfaces in particular. The Tecnifibre X-One Special Editon DTF is a true class ball, but I think the 2 other balls in question here could take over as my new favorite tennis ball Dunlop Roland Garross and the old Slazenger Wimbledon Ultravis is no longer my favorites. Which one is your favorite and WHY ?