also, not so on topic, but came to an interesting observation this week ... on Monday I first played with Xiom Omega 8 China and Xiom Vega X. we played with relatively new Hanno ball (very nice balls by Hanno, to be honest). we played for cca. 2 hours, after I finished playing the rubbers were like new. then on Wednesday I was fooling around the apartment - I do this actually several times a day, when I am at home and have time - just tapping the ball but adding spin to it, and this time I was using Xiom Bravo ball, because it has quite a big marking and it is easier to observe rotation ... after 20 minutes I take a break and put the blade away and noticed there are some significant markings on both rubbers ... so I guess, not only playability depends on the ball itself (among other factors, of course) but also the durability. I don't know if you played with Xiom Bravo, but first time I played with them I noticed, how rough they are. Nittaku, for example, are very very smooth ... this could also affect playability - rough ball, smoot table, smooth ball, smooth table ... if you understand me ...