I just wanted to say that I purchased 2 O3 Blacks recently from my local tennis shop and they didn't come with covers. I thought that was odd but no big deal. A few days ago I was surfing on the net and saw the O3 Black advertised on a site stating it came with a mail-in rebate for the covers. I called my tennis shop and they never heard of the deal. I called Prince directly and they are shipping me 2 covers no questions asked. In a world where customers are routinely treated like poop it's nice to get treated right. Thank you Prince. PS. I’m not sure if it is up to snuff for the TW elite on here but the O3 Black strung with Big Ace 18g (and don’t forget the Gamma worm!) is sweet.