after have this keyboard include with my tablet pc , I start use it regularly in the office for the past couple of week -lrb- do not use keyboard much first couple week -rrb- but be have intermittent issue with the connectivity\/syncing , not to mention the lag mention in previous review when it do work -lrb- I could have live with that though -rrb- . I would get 1-3 day of functionality before it would just stop work ... I think it be a computer\/software\/windows 7 issue so i would uninstall and re-install and it would work again for 1-3 day -lrb- 1.5 day be the average and yes i change the battery too -rrb- and after a excruciatingly long wait time with asus to get resolution -lrb- that be another review ... -rrb- they say `` we 'll send a email with return instruction '' ... the email never come ... and the keyboard finally stop work altogether -lrb- computer could no longer discover -rrb- when I call back they say the Microsoft 6000 keyboard be not cover in the warranty - it be one week past 30 day coverage ... never again for the MSFT keyboard or ASUS for that matter ... poor product poor customer service .