Actually a lot of nerve to sell the user a deterioration as innovation - but we know from Microsoft so, at least since Windoews 8 ... After the 4 and left arrow stopped working with my Curve 2000 I have this ordered here. Unwrapped, only times wondered that is so "delicate", connected ... disaster! A woman with delicate hands could find the probably great, because of the "delicate" optics. But a man with huge hands, the 8 hours in 10-finger system rumtippt daily on This dates not at all !! The buttons are too close together, the key assignment differs greatly from the usual Curve 2000.. I need a keyboard, on which I can rumhäkern in daily work stress quickly and ergonomically, precisely and correctly not caress work ... The Curve 2000 had for years tolerated very well, I do not know how long this "Tastaturchen" that would join ... Then I made me even bothered to google for "Curve repair 2000 ', I might have to make earlier times ... And I found what, see here: [...] So screwed, little hanky (a real defect I have not found), the mat lifted times and hung up, and the whole thing screwed up again - working again wonderful! So reconnected the good old woman and the Curve 2000 repackaged for return to Amazon. I have searched even with Microsoft for possible alternatives, apparently only comes the Curve 5000 in question, looks very much like 2000, for example, the G keys, H. B and N are significantly larger, as with the Curve 2000 does not equally small like all on the 3000th However, again an impudence of Microsoft, which are only available with wireless and mouse for 55 euros, but I'm working with Logitech trackball. Solo, with cord and affordable is not to have. The next few weeks I'm going to search the Internet for Remnants Curve 3000 to me a couple of bunkers to the next few years!