this keyboard be pretty cool for how cheap it be , but whenever I start typing fast , it seem to miss the first letter . as per the review that say it go to sleep after about ten seconds of innactivity , this be only true if you be use a mobile device like a ipad or cell phone . First of all , it be not ten seconds , it be more like twenty , and in my experience , if someone be use it that infrequently , they may as well be use the on-screen keyboard . this problem do not affect people use it with a computer .