ABOUT FOUR MONTHS have passed since my search for the ultimate ultraportable laptop PC concluded in the purchase of a Sharp M4000 WideNote. I had resolved to write up my impressions of this system after using it for a while, and I suppose now is about the right time. Our usual practice here at TR when reviewing a product is to test its performance twelve ways from Sunday against an array of direct competitors, but I'm not going to do that with the Sharp. This product is appealing for a host of interrelated reasons, and performance isn't near the top of the list, to be quite honest.